WATCH LIVE: Biden, Holder press lawmakers to move gun bill

Biden, along with Attorney General Eric Holder, will speak to law enforcement officials from across the country at the White House on Tuesday at 2 p.m. EDT.

The vice president and attorney general — two key players in Obama's gun legislation push — will highlight the importance of proposed gun safety measures to the law enforcement community, according to the White House.

On Monday night Obama made a last-ditch effort to build support for a Senate gun control bill by addressing a Connecticut audience that included relatives of the 20 Sandy Hook Elementary School children killed late last year by a lone gunman.

“This isn’t about me,” Obama told the audience at the University of Hartford. “And it shouldn’t be about politics. This is about doing the right thing for families like yours that have been torn apart by gun violence, and families going forward.”

Read more on Obama's speech in Hartford, Conn., as well as the Senate gun control measure.

Amie Parnes and Alexander Bolton contributed.