It might be halftime in America, but on Tuesday, it’s Republican caucuses across Colorado—and former Massachusetts Governor Mitt Romney is the clear favorite.

According to final Public Policy Polling survey of the state last week, Romney led in Colorado with 40 percent, followed by former Pennsylvania Senator Rick Santorum at 26 percent; former House Speaker Newt Gingrich was at 18 percent; and Texas Representative Ron Paul was at 12 percent. The potential results in Colorado could be the second Western wipeout for Romney, who blew away the GOP field last week in Nevada.

Perhaps most interesting statewide nugget in the PPP poll is Gingrich’s precipitous decline among Colorado Republicans: Just two months ago, the former Speaker had a 19-point lead. Now—after several Gingrich losses across the country—PPP’s results show that his net favorability among the state’s Republicans fell 33 points—from plus-41 to only plus-8.

Colorado has been a safe state for Romney in the past. In 2008, the former governor received 60 percent of the caucus vote. Eventual GOP candidate John McCain received only 18 percent.

The state's GOP caucuses begin at 7 p.m. and are open only to registered Republicans. To locate your precinct—and pre-register to attend—click here. To follow Tuesday's results, look here.