Rick Santorum endorsed his one-time bitter rival Mitt Romney in a late-night e-mail to his supporters.
41348
Rick Santorum endorses former rival Mitt Romney
30260
Former state representative Quayle endorses Romney
1386
Michele Bachmann finally decides to endorse Mitt Romney
14941
Mike Huckabee endorsed by Texas State Senator Dan Patrick
62864
Romney picks up big endorsement in South Carolina
93171
Trump endorses Romney
96609
Santorum wins Louisiana primary
36160
Rick Santorum wins Minnesota, Missouri
69246
Mitt Romney will endorse John McCain
97013
Rick Santorum endorses Grayson
149488
Donald Trump endorses Romney for president
42241
Santorum: ``Obama says he has the same position I have on gay marriage''
58000
Tim Pawlenty endorses Mitt Romney
102141
Conservative guru Richard Viguerie endorses Rick Santorum
150302
John Elway endorses Mitt Romney
81782
Santorum wins Kansas Republican caucuses
72226
Herman Cain endorses Mitt Romney