Former House Speaker Marco Rubio, the Republican candidate in November’s U.S. Senate election, took aim at Gov. Charlie Crist, who is running without party affiliation in the race. The Rubio team released a web video showing a clip of Crist responding “Who cares?” to a question about which party he will caucus with if he is elected to the Senate. Repeating the clip, the video contains quotes attempting to show that Crist has no principles and puts his personal ambitions above everything else.