Rick Santorum to Exit Campaign

Former Pennsylvania Sen. Rick Santorum will be ending his presidential campaign later this evening, according to CNN:

Rick Santorum dropping presidential bid

Former Pennsylvania Sen. Rick Santorum is ending his presidential bid, two Republican sources told CNN.

He is expected to make the announcement Wednesday night and will endorse a candidate.

Santorum won the 2012 Iowa caucuses and ended that race with the second-most number of delegates to eventually GOP nominee Mitt Romney. But he was unable to capture any momentum this year, despite extensive barnstorming efforts in Iowa.

Depending on whom he endorses, Santorum could provide a substantial boost to another candidate, signalling that a particular candidate remains viable or is deserving of support or at least consideration from key constituency groups. As a former runner-up for the GOP nomination, his departure and endorsement could be a bigger contribution to the race than might be expected from someone who finished in 11th place in the Iowa caucuses.