A total of 85 House Democrats, primarily anti-war liberals, voted Wednesday against the proposal to arm Syrian rebels against the Islamic State in Iraq and Syria (ISIS).

The majority of the Democratic caucus, 114 members total, joined 159 Republicans to pass the amendment. But an unusual coalition of nearly an equal number of Democrats (85) and Republicans (71) opposed President Obama's proposal, which was voted on as an amendment to a stopgap funding bill to avoid a government shutdown on Oct. 1. 

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Several centrist Democrats in tough reelection races voted in favor of arming the rebels, including Reps. Ron BarberRonald (Ron) Sylvester BarberPrinciples and actions mean more than Jeff Flake’s words Giffords to lawmakers avoiding town halls: 'Have some courage' Ten House seats Dems hope Trump will tilt MORE (Ariz.), Nick RahallNick RahallLikely W.Va. Senate GOP rivals spar in radio appearances West Virginia is no longer Clinton country Solution needed: Rail congestion is stifling economic growth MORE (W.Va.), Collin Peterson (Minn.), Raul Ruiz (Calif.) and Kyrsten Sinema (Ariz.). Rep. Gary Peters (Mich.), who is a Democratic candidate for Senate, also voted yes.

Other Democrats, such Rep. Jim McGovern (D-Mass.), voted no because they believe that Congress should vote on a full authorization of military force against ISIS instead of a narrow measure considered as part of a short-term spending bill.

Still other Democrats, such as Reps. Carolyn Maloney (N.Y.) and Jackie Speier (Calif.), said they are wary of becoming involved in another military conflict in the Middle East.

"We should be frank with ourselves and the American people. We are not facing a limited engagement, but a new war that will only escalate," Speier said.

Most of the Congressional Black Caucus voted for the amendment, but Chairwoman Marcia FudgeMarcia Louise FudgeHouse Dems introduce articles of impeachment against Trump Lawmakers push regulators on how Amazon's Whole Foods deal could affect 'food deserts' Dems announce 'unity commission' members MORE (D-Ohio) and others including Reps. Emanuel Cleaver (D-Mo.), Elijah Cummings (D-Md.), Charlie Rangel (D-N.Y.), John Lewis (D-Ga.) and Gwen MooreGwen Sophia MooreFCC votes to limit program funding internet access for low-income communities More than a dozen lawmakers put family on campaign payroll Freddie, Fannie should offload risk to private insurers MORE (D-Wis.) voted against it.

Members opposed to the measure formed an unusual set of bedfellows consisting of liberals and far-right conservatives rarely seen casting the same vote on a major issue.

A sizable group of libertarian Republicans that included Reps. Justin AmashJustin AmashThe 13 House Republicans who voted against the GOP tax plan House Judiciary advances warrantless wiretapping reform bill The Hill's Whip List: Where Republicans stand on tax-reform bill MORE (Mich.), Walter Jones (N.C.) and Thomas Massie (Ky.) opposed the amendment.

Some GOP lawmakers who voted no, such as Reps. Michele BachmannMichele Marie BachmannBachmann praises Trump as man of faith Tom Petty dies at 66 Bachmann: Muslim immigrants trying to undermine Western civilization MORE (Minn.) and Matt SalmonMatt SalmonMcSally tells GOP colleagues she'll run for Arizona Senate GOP Senate hopeful Kelli Ward leads challengers in internal poll Paul says he still supports McConnell after endorsing anti-McConnell candidate MORE (Ariz.), distrust the Syrian rebels and would prefer the U.S. launch a full authorization of military force.