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DENVER — Mitt Romney’s campaign is set for a four-day string of events and rallies in Colorado featuring high-profile surrogates, culminating with a rally featuring Romney and running-mate Paul Ryan at Red Rocks Amphitheater Tuesday night.

Saturday morning, comedian Jeff Foxworthy will rally supporters in Colorado Springs. Texas Gov. Rick Perry, who challenged Romney for the GOP nomination earlier this year, will campaign for Romney Sunday afternoon with events in Colorado Springs and Pueblo.

Incidentally, President Barack Obama, stumping in Virginia on Friday, actually appeared to do an impression of Foxworthy, riffing on Romney’s “Romnesia”, a new one-liner, a la the comedian’s “You might be a redneck” routine.

“If you say you’re for equal pay for equal work, but you keep refusing to say whether or not you’d sign a bill that protects equal pay for equal work — you might have Romnesia,” Obama said, repeating the refrain with other examples of where Romney’s positions have, in Obama’s view, shifted.

On Monday, vice presidential nominee Paul Ryan will hold rallies in Colorado Springs and Grand Junction, two bright red parts of this purple state, in an effort to energize the GOP base, which will need to turn out in big numbers to put Romney over the edge in the battle for the state’s nine electoral votes.

Tuesday night marks the culmination of the four-day surge with the rally at historic Red Rocks, the famed concert venue tucked between two giant monoliths with stunning views of metro Denver. The venue seats 9,450 people, which, if filled, would be Romney’s largest Colorado crowd to date.

The surge in activity mirrors the campaign’s four days of rallies in the run-up to the first presidential debate here earlier this month, when Romney, his wife, Ann, and Florida Sen. Marco Rubio rallied supporters for three days leading up to the Oct. 3 debate before Romney took a victory lap at a conference of conservatives the following morning.

Polls show Colorado is one of the true toss-ups left on the electoral college map.

Obama won the state by nine points over Sen. John McCain four years ago.

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