Former Sen. Joe Lieberman announced Wednesday he will vote for former Secretary of State Hillary Clinton, citing her work in the Senate and ability to work across party lines as the main reason.

Lieberman, an independent Democrat and 2000 Democratic vice presidential nominee, told Fox Business host Maria Bartiromo, also noting his history with the former New York senator, as well as former President Bill Clinton, dating back to their time at Yale Law School. He also said that he hadn't waded into the 2016 conversation because of his work for No Labels, an independent group that pushes members of Congress to cross party lines to pass legislation.

"Somebody asked me this question last week and I said I haven't really announced who I'm supporting. But you asked me, I'm just going to say it and get it over with," Lieberman told the host. "I'm an independent Democrat, I never changed parties, and I'm going to vote for Hillary Clinton."

"I'm going to vote for Hillary Clinton because [I've known] her forever, and her husband back to when they were at Yale Law School. I worked with her closely in the Senate for eight years," Lieberman said. "She's strong, she's smart, she understands national security. What I was most impressed with in our years in the Senate together was she reached across party lines to try to build coalitions to get something done."

The former Connecticut senator has a history of bucking the Democratic Party on occasion, having supported Sen. John McCain in 2008 against then-Sen. Barack Obama.

Earlier this week, Lieberman declined to say who he was supporting, leading some to speculate that he could endorse Republican nominee Donald Trump.