Biden and First Lady Jill Biden left the White House just a few moments ago for the short drive up Pennsylvania Avenue to the U.S. Capitol, where the president will deliver his first State of the Union address tonight.

Biden did not respond to a shouted question asking if Russian President Vladimir Putin has committed war crimes in Ukraine.

-ABC News' Justin Ryan Gomez

Biden tonight will touch on his plan to address crime and make the case for more community-based policing, rather than defunding the police, a White House official told ABC News.

"He'll make clear that the answer is not to defund the police, it’s to put more police -- with better training and more accountability -- out to take back our streets and make our neighborhoods safer," the White House official said. "And he’ll talk about the steps his administration has taken -- and will continue to take -- to advance that accountability and rebuild trust between law enforcement and the communities they serve."

Biden will also call on Congress to address gun violence, and pass "common-sense" gun violence legislation that will save lives, according to the official.

-ABC News' Molly Nagle

The nation's capital has ramped up security ahead of Biden's first State of the Union address tonight.

Up to 700 National Guard troops have been made available to assist local law enforcement, and a controversial inner-perimeter fence once again surrounds the U.S. Capitol.

The U.S. Capitol Police have also been working in tandem with local, state and federal law enforcement agencies on a "security plan to prevent any disruption to the important work of Congress," Capitol Police Chief Tom Manger said in a statement earlier this week.

-ABC News' Noah Minnie

For more live coverage of the State of the Union, head to FiveThirtyEight, which is providing updates on Biden's address as well as the Texas primary election.

"Given the current state of affairs, both foreign and domestic, tonight is a big night for the president," writes FiveThirtyEight politics reporter Alex Samuels.

Biden will call on Congress to pass a "unity agenda," comprising several initiatives that have been historically popular on both sides of the aisle, an administration official said on a call with reporters Tuesday morning.

While the call went on to highlight one example of the unity agenda -- mental health care -- the term is notable. The "unity agenda" could be the reframing of his stalled Build Back Better proposal -- Biden picking and choosing portions of that package his administration believes could pass with bipartisan support.

Biden will call for mental health initiatives, in the context of worsening mental health due to the pressures of the pandemic. One especially notable one: Due to mounting evidence that social media plays a major role in mental health challenges for young people, Biden will call on Congress to strengthen social media privacy protections, ban targeted advertising to kids and demand technology companies stop collecting personal data on children, an administration official said.
-ABC News' Sarah Kolinovsky