Most Democrats have viewed the race as primarily between Crowley and Polis, but Lee holds sway among the party’s liberal wing.
One significant challenge for Lee is that fellow Californian Becerra is all but certain to ascend to Caucus chairman. Some Democrats doubt the Caucus would put two lawmakers from the same state into the chairman and vice chairman slots.
Vice President Joe Biden waits to conduct a mock swearing-in ceremony with Sen. Brian Schatz, D-Hawaii, in the Capitol's Old Senate Chamber, December 2, 2014. Schatz was sworn in to serve the remainder of his term since he was appointed to the seat after Sen. Daniel Inouye, D-Hawaii, passed away.