Former Minnesota Gov. Tim Pawlenty
Once considered a top contender for the GOP nomination, Pawlenty bowed out in August after an unimpressive showing in the straw poll in Ames, Iowa.
One month later, he endorsed Romney, and has been a loyal ally ever since, frequently speaking on Romney’s behalf and encouraging the GOP establishment to get behind the man from Massachusetts.
Romney and his supporters returned the favor by helping Pawlenty retire his campaign debt, which totaled more than $400,000 when he left the race.
Pawlenty has also been floated as a possible vice-presidential pick for Romney.