Reporting from Port Saint Lucie, Fla.— Dubbed the "proxies with moxie," Mitt Romney's congressional backers have been crashing Newt Gingrich's events to offer a counterpoint to the former House speaker's remarks. It's an unusual tactic to begin with, but their collisions with Gingrich's testy spokesman, R.C. Hammond, have made their sparring into the campaign trail's version of must-see TV. Gingrich said he doesn't mind their presence, which he said is a sign of desperation by Romney. "They send a member of Congress, we send R.C. It's a slight overmatch — R.C.'s a little bit more informed than they are, but...