Romney is not the only Republican that has not given the Tea Party the attention they may desire. Newly elected Senators Marco Rubio, Ron Johnson, and Pat Toomey have chosen not to join the newly formed Senate Tea Party caucus. I don't want to put words in their collective mouths, but maybe they believe they are Republicans first and any other affiliations come somewhere else down the line.
Bob Schlesinger of the U.S, News and World Report has a different take on Romney's actions or in-actions, depending on which way you look at it. He seems to suggest that it may be deliberate and part of a strategy. In his article, he makes 3 points as to why he believes this:
The full Schlesinger article can be read HERE.
Second by using the Tea Party as a foil Romney can combat one of his own biggest negatives: his reputation for being a political weather vane.....But by refusing to kowtow to the Tea Party Romney could build a counter-narrative.
Finally, Romney could be positioning the Tea Party for something of a Sister Souljah moment with an eye toward avoiding a Sharron Angle moment. ....By steering clear of the fringe, Romney could position himself as the kind of acceptable Republican able to take advantage of a faltering Obama.