![Marco Rubio: A candidate still searching for a viable base](http://townsquare.media/site/385/files/2016/03/rubiomarco.jpg?w=980&q=75)
Marco Rubio: A candidate still searching for a viable base
The Florida senator has struggled to reconnect with the kind of voters who sent him to Capitol Hill six years ago as a tea party favorite, instead watching them fuel Trump and his closest challenger to winning the GOP presidential nomination, Texas Sen. Ted Cruz.