Joe Biden. Photo: Chip Somodevilla/Getty Images

Former Vice President Joe Biden told a group of approximately 200 fundraiser attendees Friday night that he has received intelligence briefings warning of Russia, China and other foreign adversaries seeking to interfere in the 2020 U.S. elections.

What he's saying: "We know from before and I guarantee you I know now because now I get briefings again," Biden told the group. "The Russians are still engaged in trying to delegitimize our electoral process. Fact."

  • "China and others are engaged as well in activities that are designed for us to lose confidence in the outcome," he added.

Why it matters: Biden is leading in state and national polls against President Trump less than four months from election day. But Russian interference helped push Trump to victory in 2016, and could be a defining factor in the final stretch of the 2020 campaign season.

  • The federal government began briefing presidential campaigns and national parties on election threats from foreign adversaries in recent weeks, The Washington Post reported.

Go deeper

Trump says men may be "insulted" by Biden picking a woman for VP

Photos: Mark Makela/Getty Images; Brendan Smialowski/AFP via Getty Images

President Trump suggested Tuesday that some men feel "insulted" by Joe Biden's promise to choose a woman as his running mate, telling Fox Sports Radio that the former vice president has "roped himself into a certain group of people.”

Why it matters: The comments come as Biden's campaign is expected to announce his pick imminently, drawing a close to a slow, deliberative process that has highlighted the fundamental differences between his campaign and Trump's re-election effort.

First look: New Trump ad doubles down on radical left frame for Biden

Combination images of President Trump and Joe Biden. Photo: Scott Olson/Getty Images/Mark Makela/Getty Images

The Trump campaign launches a new ad Tuesday in five early-voting states that hits Joe Biden on taxes and immigration, redoubling a strategy to paint the Democratic nominee as a tool of the radical left.

Driving the news: "In His Own Words" will be a "high seven figure" spend running in Florida, Arizona, North Carolina, Georgia and Wisconsin, a senior campaign official tells Axios.

Trump tries to set a tax trap for Biden

Photo: Jim Watson/AFP via Getty Images

President Trump is trying to lure Joe Biden into a Walter Mondale trap — attempting to force the Democratic nominee to embrace middle-class tax increases as part of his election strategy.

Why it matters: With his Saturday evening executive action to unilaterally rewrite the tax code, Trump again is demonstrating the lengths to which he’ll go to change the conversation — and try to make the election a choice between him and Biden, and not a referendum on him.