By David Hylton
Warner was also the Chairman of the Senate Armed Services Committee and former Secretary of the U.S. Navy.
"The event will highlight how Hillary Clinton is by far the strongest and most experienced candidate on a full range of national security issues, and that she has the knowledge, steadiness and temperament to be Commander in Chief," Clinton's campaign said in an email. "Warner will signal for the first time in his long and distinguished career his intention to vote for a Democratic presidential ticket: Clinton-Kaine."
Warner will join Kaine in Alexandria to make the announcement at 9:15 a.m. Wednesday at the Charles Houston Recreation Center in Alexandria.