Now, there are three.
Rick Santorum's announcement today that he is suspending his Republican presidential campaign leaves only frontrunner Mitt Romney, Newt Gingrich and Ron Paul in the GOP sweepstakes. Gingrich
and Paul are no longer considered factors in the race for the nomination.
University at Buffalo political scientist James Campbell told WBFO News he was not surprised at today's announcement.
"In the last few weeks, it appeared inevitable that Mitt Romney would be the Republican nominee and I'm sure former Senator Santorum had some difficulty raising sufficient funds to keep his campaign alive," said Campbell.
Campbell says many Santorum supporters are skeptical of Romney's conservative credentials and will find it difficult to adopt Romney as the party's nominee. But he says he expects fellow Republicans to rally behind Romney in the coming weeks.
"There's a lot of bad blood that's been shed in this nomination contest and I would expect Santorum and the other Republican hopefuls would eventually come around indicating their enthusiastic support for the nominee," Campbell added.
Santorum made no mention of Romney in his suspension announcement Tuesday afternoon. He did say he will continue the fight to defeat President Barack Obama.