I didn’t even know he dropped out of the race:

Tom Tancredo endorsed Mitt Romney at a press conference at the Mariott Hotel in downtown Des Moines, Iowa, today. Tancredo said that he met with Romney this morning and that he is convinced the former Massachusetts governor is committed to securing the borders and ending sanctuary cities.
[…]
Tancredo hinted in his opening remarks that the timing of his endorsement was meant to slow the rise of Mike Huckabee and confirmed this later in response to a question. “It was important in making a decision,” he said. “You bet your life it was.”

Well, I’m glad he’s gone! He hung in way too long and it clears out another competing conservative.
Here’s Scott Ott’s take.