Manchin becomes final Democrat to back bill preventing separation of immigrant families
© Greg Nash

Sen. Joe ManchinJoseph (Joe) ManchinThe Memo: Tide turns on Kavanaugh McCaskill to oppose Kavanaugh nomination The Memo: Kavanaugh firestorm consumes political world MORE (D-W.Va.) said on Monday that he will back legislation to prevent the separation of immigrant families along the border, solidifying Democratic support for the bill.

Manchin's decision means all 49 members of the Democratic caucus, which includes independent Sens. Bernie SandersBernard (Bernie) SandersTrump's trade war — firing all cannons or closing the portholes? The Hill's 12:30 Report — Trump rips 'ridiculous' spending bill | FBI dragged into new fight | Latest on Maryland shooting Poll: Most Massachusetts voters don't think Warren should run for president in 2020 MORE (Vt.) and Angus KingAngus Stanley KingRestoring our national parks would be a bipartisan win for Congress Restore our parks Renaming Senate office building after McCain sparks GOP backlash MORE (Maine), are signing on to the legislation.

“As a father, grandfather, and Christian, I am wholeheartedly opposed to any policy that allows innocent children to be separated from their parents as they enter our country," Manchin said in a statement.

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"No law requires pulling children from the arms of their parents," he added.

The legislation, spearheaded by Democratic Sen. Dianne FeinsteinDianne Emiel FeinsteinFeinstein's office says it has received threats over Kavanaugh Dem senator praises Ford opening the door to testifying The chaos in the Kavanaugh nomination illustrates the high stakes of the Supreme Court MORE (Calif.), would only allow children to be separated from a parent if they are being abused, trafficked or if a court decides "it is in the best interests of the child."

As of late last week, it had the support of 43 senators in the caucus. Five more red-state Democrats — Sens. Claire McCaskillClaire Conner McCaskillTrump rallies in Nevada amid Supreme Court flurry: 'We're gonna get Brett' Trump boosts Heller, hammers 'Wacky Jacky' opponent in Nevada Google says senators' Gmail accounts targeted by foreign hackers MORE (Mo.), Doug Jones (Ala.), Jon TesterJonathan (Jon) TesterTrump Jr. campaign event looks for new venue after Montana restaurant declines to host CBS Poll: Missouri, Montana Senate races in dead heats Dems play waiting game with Collins and Murkowski MORE (Mont.), Joe DonnellyJoseph (Joe) Simon DonnellyThe Memo: Tide turns on Kavanaugh McCaskill to oppose Kavanaugh nomination The Memo: Kavanaugh firestorm consumes political world MORE (Ind.) and Heidi HeitkampMary (Heidi) Kathryn HeitkampThe Memo: Tide turns on Kavanaugh McCaskill to oppose Kavanaugh nomination Election Countdown: Trump confident about midterms in Hill.TV interview | Kavanaugh controversy tests candidates | Sanders, Warren ponder if both can run | Super PACs spending big | Two states open general election voting Friday | Latest Senate polls MORE (N.D.) — announced over the weekend they would sign on to the bill, leaving Manchin as the last remaining holdout.

Manchin, McCaskill, Tester, Donnelly and Heitkamp are running for states easily won by Trump during the 2016 election.

The Feinstein bill, however, faces an unlikely, uphill climb in a GOP-controlled Congress, despite growing backlash over the Trump administration's policies that are resulting in the separation of immigrant families at the border.

No Republican senator has said they will support Feinstein's bill, which would need 60 votes to clear the Senate.

Manchin added on Monday that the United States needs to "secure our borders and enforce our immigration laws" and that he's talking with GOP lawmakers about broader legislation.

"I am actively working with my Republican colleagues to find solutions to the issues that are not addressed" in Feinstein's bill, he said. "I continue to believe that the comprehensive 2013 immigration bill that included 700 miles of fencing, an addition 20,000 border control agents and other measures to secure our border is where we should begin this process."