SARASOTA, Florida—The National Republican Congressional Committee (NRCC) just held its winter meeting here, and the wealthy beachfront communities that dot the coast are typically considered one of the beating hearts of the Establishment GOP's donor community. Tonight, though, it's Cruz country. An event originally scheduled as a small rally for potential 2016 presidential candidate Sen. Ted Cruz (R-TX) mushroomed into a major political event after nearly 2,000 people RSVP'd online. “We are shocked at the level of interest that we’ve received for doing this rally,” Sarasota GOP chairman Joe Gruters told Breitbart News. “It’s obvious that the state is aware...