WASHINGTON — President Donald Trump on Friday minimized new warnings from U.S. intelligence experts that Russia is interfering in this year’s election campaign, and revived old grievances in claiming that Democrats are determined to undermine the legitimacy of his presidency.

Intelligence officials told lawmakers in a classified briefing last week that Russia is meddling with the hope of getting Trump reelected, according to officials familiar with the briefing.

But Trump pushed back against the notion that Russia is working again to help him win and accused Democrats of trying to politically damage him.

“Another misinformation campaign is being launched by Democrats in Congress saying that Russia prefers me to any of the Do Nothing Democrat candidates who still have been unable to, after two weeks, count their votes in Iowa. Hoax number 7!” Trump tweeted.

The fresh intelligence warnings about Russian interference came in what has been a tumultuous stretch for the intelligence community.A day after the Feb. 13 briefing to the House Intelligence Committee, Trump berated the acting Director of National Intelligence Joseph Maguire in a meeting at the White House. Then this week, Trump abruptly announced that Maguire would be replaced by Richard Grenell, a Trump loyalist who also will hold the job in an acting capacity.

Acting director of national intelligence Joseph Maguire was replaced by Richard Grenell, a vocal ally of President Trump’s. Associated Press/Andrew Harnik

Trump tweeted Friday that he was considering four candidates to serve as permanent intel director and expected to make a decision within the next few weeks. He told reporters Thursday evening that Rep. Doug Collins of Georgia was among those he’s considering.

But Collins, who is vying for one of Georgia’s Senate seats, said Friday he’s not interested in the job overseeing the nation’s 17 spy agencies.

The installation of Grenell, even in a temporary role, has raised questions among critics about whether Trump is more interested in having a loyalist instead of someone steeped in the complicated inner workings of international intelligence.

President Donald Trump’s envoy for the Kosovo-Serbia dialogue, Ambassador Richard Grenell listens Serbian President Aleksandar Vucic during a press conference after their meeting, in Belgrade, Serbia in January. AP Photo/Darko Vojinovic

Grenell has a background that is primarily in politics and media affairs. Most recently, he’s been serving as Trump’s chief envoy to Germany.

The Democratic chairman of the House Homeland Security Committee, Bennie Thompson of Mississippi, dismissed Grenell as someone who, “by all accounts, rose to prominence in the Trump administration because of his personal devotion to Donald Trump and penchant for trolling the President’s perceived enemies on Twitter.”

From the start of his presidency three years ago, Trump has been dogged by insecurity over his loss of the popular vote in the general election and a persistent frustration that the legitimacy of his presidency is being challenged by Democrats and the media, aides and associates say. He’s also aggressively played down U.S. findings that Russia interfered in the 2016 election.

In addition to those findings by the major intelligence agencies, a nearly two-year investigation led by special counsel Robert Mueller concluded there was a sophisticated, Kremlin-led operation to sow division in the U.S. and upend the 2016 election by using cyberattacks and social media as weapons.

Moscow has denied any meddling. Kremlin spokesman Dmitry Peskov said Friday that the newest allegations are “paranoid reports that, unfortunately, there will be more and more of as we get closer to the elections (in the U.S.). Of course, they have nothing to do with the truth.”

But in the U.S., House Speaker Nancy Pelosi tweeted that, “American voters should decide American elections — not Vladimir Putin.” She added that all members of Congress “should condemn the President’s reported efforts to dismiss threats to the integrity of our democracy & to politicize our intel community.”

Rep. Adam Schiff, D-Calif., the chairman of the House Intelligence Committee, tweeted: “We count on the intelligence community to inform Congress of any threat of foreign interference in our elections. If reports are true and the President is interfering with that, he is again jeopardizing our efforts to stop foreign meddling. Exactly as we warned he would do.”

Hillary Clinton, the 2016 Democratic presidential nominee, said of Trump and the new warnings: “Putin’s Puppet is at it again, taking Russian help for himself.”

“He knows he can’t win without it. And we can’t let it happen,” she said on Twitter.

The U.S. intelligence agencies say Russia interfered in the 2016 election through social media campaigns and by stealing and distributing emails from Democratic accounts. They say Russia was trying to boost Trump’s campaign and add chaos to the American political process.

Mueller concluded separately that Russian interference was “sweeping and systematic,” but he did not find a criminal conspiracy between Russia and the Trump campaign.

Republican lawmakers who were in last week’s briefing by the director of national intelligence’s chief election official, Shelby Pierson, pushed back by saying Trump has been tough on Russia, according to one of the officials describing the meeting.

While Trump has imposed severe economic sanctions on Russia, he also has spoken warmly of Putin and withdrawn troops from areas including Syria, where Moscow could fill the vacuum. He delayed military aid last year to Ukraine, a Russian adversary — a decision that was at the core of his impeachment proceedings.

The tumult caused by the sudden ouster of Maguire adds a new chapter to Trump’s fraught relationship with the intelligence community. He has derided intelligence officials as part of a “deep state” of entrenched bureaucrats who seek to undermine his agenda.

In addition to feuding over the Russian interference, he’s claimed that members of the intelligence community unfairly accused him of unlawfully pressuring Ukraine’s president to investigate former Vice President Joe Biden, another central element of the impeachment drama.

At times, Trump has mocked the intelligence community, which he sees as obsessed with Russia. During a meeting with Putin on the sidelines of an international summit in Japan last year, Trump jokingly turned to Putin and playfully told him, “Don’t meddle in the election, President.”

Pierson told NPR in an interview that aired last month that the Russians “are already engaging in influence operations relative to candidates going into 2020. But we do not have evidence at this time that our adversaries are directly looking at interfering with vote counts or the vote tallies.”

Pierson, appointed in July 2019 by then-Director of National Intelligence Dan Coats, works with intelligence agencies including the CIA, the FBI, the National Security Agency and the Department of Homeland Security to identify anyone seeking to interfere with U.S. elections.

Pierson said it’s not just a Russia problem.

“We’re still also concerned about China, Iran, non-state actors, hacktivists and frankly — certainly for DHS and FBI – even Americans that might be looking to undermine confidence in the elections.”

At an open hearing this month, FBI Director Christopher Wray told the House Judiciary Committee that Russia was engaged in “information warfare” heading into the November election, but that law enforcement had not seen efforts to target America’s infrastructure. He said Russia is relying on a covert social media campaign to divide the American public.

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Associated Press writers Eric Tucker and Michael Balsamo in Washington, Zeke Miller in Las Vegas and Daria Litvinova in Moscow contributed to this report.