The National Republican Congressional Committee has canceled planned advertising buys in Rep. Mike Coffman Michael (Mike) Howard CoffmanColorado mayor says he called protesters 'domestic terrorists' out of 'frustration' Colorado governor directs officials to reexamine death of Elijah McClain in police custody Petition demanding justice for Elijah McClain surpasses 2 million signatures MORE's (R-Colo.) district, a sign the GOP no longer thinks he can win his bid for re-election.

The NRCC is canceling $1 million in buys in Coffman's district, in the Denver suburbs.

It will spend that money and more in Florida's 27th district, where Rep. Ileana Ros-Lehtinen Ileana Carmen Ros-LehtinenEx-Florida GOP congresswoman under federal investigation: report 'Trump show' convention sparks little interest on K Street Shalala to face Salazar in Florida rematch MORE (R) is retiring this year, according to a party source with knowledge of their advertising plans.

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The party will spend $2 million in late advertising in Miami, where a first-time candidate is running a stronger-than-expected bid to keep an open seat that gave Hillary Clinton Hillary Diane Rodham ClintonFox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio Trump, Biden court Black business owners in final election sprint The power of incumbency: How Trump is using the Oval Office to win reelection MORE a majority of its votes.

The district favored Clinton over President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE by a nearly 20-point margin in 2016. Barack Obama Barack Hussein ObamaObama warns of a 'decade of unfair, partisan gerrymandering' in call to look at down-ballot races Quinnipiac polls show Trump leading Biden in Texas, deadlocked race in Ohio Poll: Trump opens up 6-point lead over Biden in Iowa MORE also won the seat twice.

But this year, former television anchor and reporter Maria Elvira Salazar (R) is running neck and neck with the Democratic nominee, former Health and Human Services Secretary and University of Miami President Donna Shalala (D).

Shalala has been the target of Democratic ire for running what observers call a lackluster race. A Mason-Dixon survey conducted earlier this month found Salazar leading Shalala by a 44 percent to 42 percent margin. Last month, Shalala's and Salazar's campaigns each released internal polls that showed their candidates leading.

Coffman is in a much tougher position. Though he has survived difficult fights before, the five-term Republican who represents suburban Denver has trailed his Democratic challenger, attorney Jason Crow, for months.

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Two Siena College polls conducted for the New York Times show Crow ahead by an amount larger than the margin of error. The most recent, conducted this week, found Crow ahead 47 percent to 38 percent.

The NRCC had already spent $1 million propping up Coffman in the last month, before they decided to pull the plug Friday.

The Congressional Leadership Fund, the largest super PAC that supports House Republican candidates, pulled out of Coffman's district last month.