CNN

Thompson took aim at Romney and Giuliani early Wednesday night.

(CNN) - In his first at-bat of the night, former Sen. Fred Thompson of Tennessee didn't hesitate to go after two of his main rivals, former Gov. Mitt Romney of Massachusetts and former New York City Mayor Rudy Giuliani. In response to a question about immigration, Thompson accused Romney of supporting President George W. Bush's failed immigration reform plan, and then shifting positons. He then joined Romney in going after Giuliani by also labeling New York a sanctuary city while Giuliani was mayor.

– CNN Nevada Producer Alexander Marquardt