It took 16 days, but Rick Santorum can now claim victory in the Iowa caucus
Newt Gingrich picks up Rick Perry's endorsement but still faces hurdles in gaining ground on Mitt Romney in South Carolina
Members from both parties question President Obama's decision to block a job-creating oil pipeline
Mitt Romney's GOP challengers land a few blows but may not be able to win the fight for South Carolina
A group of influential evangelical leaders and social conservatives endorses Rick Santorum
