The tea party movement exploded onto the political scene in 2009 as a backlash to the agenda pushed by President Barack Obama and congressional Democrats, but a little more than a year later, a POLITICO survey found tea party activists unhappy with many of the biggest names in the Republican Party. And that could complicate GOP plans to harness the energy of the tea parties as they head into the November midterm elections with hopes of rearranging the balance of power in Washington. In a survey of more than three dozen grass-roots tea party leaders from 29 states, the party’s...