Lieberman: Dems won't win with slide to left
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Former Sen. Joe Lieberman (I-Conn.) argues the Democratic Party will not win elections if the liberal wing of the party takes over.

"Here is my fear about the future of the Democratic Party. In a way, relatively speaking, Hillary ClintonHillary Diane Rodham ClintonPennsylvania GOP authorizes subpoenas in election probe We must mount an all-country response to help our Afghan allies Biden nominates ex-State Department official as Export-Import Bank leader MORE was representative of ... center-left of the Democratic Party, not the pure left," Lieberman said in a radio interview with John Catsimatidis on Sunday.

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"Now I think there will be a real attempt by the left-left of the Democratic Party to take over the party, and I don't think that's the way to go to make it an effective party," he continued.

"It's certainly not the party that I got drawn to ... it's not the party that I worked so hard for when Bill ClintonWilliam (Bill) Jefferson ClintonBusiness coalition aims to provide jobs to Afghan refugees Biden nominates ex-State Department official as Export-Import Bank leader Obamas, Bushes and Clintons joining new effort to help Afghan refugees MORE was president and it's not going to be a winning party."

Democrats have been grappling with the future of their party following Donald TrumpDonald TrumpFormer Sen. Heller to run for Nevada governor Overnight Defense & National Security — Milley becomes lightning rod Joint Chiefs Chairman Milley becomes lightning rod on right MORE's upset win over Hillary Clinton last month. Republicans also maintained their majorities in both the House and Senate.

Lieberman, a former Democrat who served as the party's 2000 vice presidential nominee, expressed hope that incoming Senate Democratic Leader Charles SchumerChuck SchumerCEOs urge Congress to raise debt limit or risk 'avoidable crisis' If .5 trillion 'infrastructure' bill fails, it's bye-bye for an increasingly unpopular Biden The Hill's Morning Report - Presented by National Industries for the Blind - Schumer: Dem unity will happen eventually; Newsom prevails MORE (D-N.Y.) facilitates compromise with Republicans.

Lieberman stressed the importance of political cooperation between both parties while warning about the danger of going "back to the extremes."

"To me, both parties better watch out not to go back to the extremes — left and right — and not working with each other. I think that the public really wants both parties to get together, work together and solve some of the problems of our country, make the future better," he said.