Former Sen. Rick Santorum, R-Penn., will drop out of the US presidential race, effectively leaving the endorsement to Republican frontrunner Mitt Romney.
134522
Santorum to drop out of presidential race
71124
Ajc to no longer endorse candidates
13732
Hillary Clinton steps down as US secretary of state
143434
Keneally quits politics
144419
Santorum files to appear on in ballot
174963
Jon Huntsman drops out of the presidential race
124026
Simon Cowell quits American Idol
156280
Torsella bows out of Senate race
108760
Mitt Romney to endorse Sen. John McCain
67307
Rick Santorum endorses Mitt Romney
13179
Gay Conservative candidate resigns
92075
William Tong drops out of race for US Senate
55743
Ron Paul will defeat Mitt Romney in the Virginia primary
111360
Romney says Santorum isn'ta fiscal conservative
57943
Romney and Santorum collide in Michigan primary
28159
Romney accepts endorsement from McCain
102720
Mohamed Bin Hammam withdraws from Fifa presidential election