Updated

Presumptive Democratic presidential nominee Joe Biden pulled no punches in going after President Trump on Tuesday during his first press conference in 89 days, while also saying some statues across the country should be removed and teasing his forthcoming announcement about a running mate.

While Biden’s press conference in Delaware was ostensibly about how he would respond to the coronavirus pandemic, the former vice president slammed the current White House occupant for his response to reports that Russian intelligence operatives offered to pay bounties to Taliban-linked militants who killed U.S. troops in Afghanistan.

Trump on Sunday denied that he had been briefed about the matter before the New York Times reported on it over the weekend.

“The idea that somehow he didn’t know is a dereliction of duty if that’s the case,” Biden said while taking questions from reporters. “And if he was briefed and he didn’t do anything about it that is a dereliction of duty.”

FORMER BUSH, TRUMP ADMINISTRATION OFFICIALS FORM PRO-BIDEN SUPER PAC

Also during the press conference, Biden said that he has not been tested yet for coronavirus as he's "had no symptoms" and that he doesn't want to "take anybody else’s place in the process." He added that Secret Service is being regularly tested and that he will get tested "relatively soon."

Asked about the debate over the removal of certain statues across the country, Biden said: "I think those statues belong in museums, they don’t belong in public places.” But he drew a distinction between figures like George Washington and Thomas Jefferson, who owned slaves, and Confederate leaders who fought to maintain slavery.

Biden also said that he is also putting together a list of African American women who could serve on the Supreme Court -- though he is not prepared to publicly release though names -- and said he intends to announce his vice presidential nominee several weeks before The Democratic National Convention in August.

As for the Russian bounty reports, Biden on Tuesday said it was unimaginable that Trump would not have known about the intelligence and called into question the president’s cognitive abilities.

"The president talks about cognitive capability, but he is not cognitively aware of what’s going on,” Biden said, reversing a hit the president has used against him.

Then, pressed by Fox News' reporter Doug McKelway, Biden defended his own abilities: “I can hardly wait to compare my cognitive ability to the cognitive ability of the man I’m running against."

News that Moscow allegedly offered bounties to Afghan militants who killed U.S. soldiers was first reported over the weekend in the New York Times.

The Washington Post further reported that the Russian bounties are "believed to have resulted in the deaths of several U.S. service members." And The Associated Press reported that officials said an April 2019 attack on an American convoy that killed three Marines in Afghanistan is under investigation.

Trump on Sunday denied that he and Vice President Mike Pence had been briefed on the matter – saying in a late-night tweet that U.S. intelligence services “did not find this info credible, and therefore did not report it to me.”

THE LATEST FROM FOX NEWS ON THE 2020 PRESIDENTIAL CAMPAIGN

The Associated Press reported on Tuesday that top officials in the White House were aware in early 2019 of classified intelligence indicating Russia was secretly offering bounties to the Taliban for the deaths of Americans, a full year earlier than has been previously reported.

The assessment was included in at least one of President Donald Trump’s written daily intelligence briefings at the time, according to the officials. Then-national security adviser John Bolton also told colleagues at the time that he briefed Trump on the intelligence assessment in March 2019.

CLICK HERE FOR THE FOX NEWS APP

The White House didn't respond to questions about Trump or other officials’ awareness of Russia’s provocations in 2019. The White House has said Trump wasn't — and still hasn't been — briefed on the intelligence assessments because they haven't been fully verified. However, it's rare for intelligence to be confirmed without a shadow of a doubt before it is presented to top officials.

Biden's decision to hold a press conference came after Republicans - and the Trump campaign -- have hit Biden over the lack of availabilities recently.

Earlier Tuesday, Trump campaign spokesman Tim Murtaugh spotlighted that Biden’s gone 89 days without “taking free rolling questions from the press.”

“In that same time period President Trump has held 55 question and answer sessions with reporters," Murtaugh said.

He added: “Joe Biden can’t stand the bright lights of scrutiny. Every time he ventures out from his basement, he makes some grave error that his campaign has to deal with for several days that follow.”

Fox News' Paul Steinhauser and The Associated Press contributed to this report.