Dem pollster: Clinton showed that being against Trump is not enough to win

Democratic pollster Carly Cooperman on Wednesday pointed to Hillary ClintonHillary Diane Rodham ClintonFrustration boils over with Senate's 'legislative graveyard' Poll: Nearly half of Clinton's former supporters back Biden Harris readies a Phase 2 as she seeks to rejuvenate campaign MORE's 2016 presidential bid to argue that opposing President TrumpDonald John TrumpNASA exec leading moon mission quits weeks after appointment The Hill's Morning Report — After contentious week, Trump heads for Japan Frustration boils over with Senate's 'legislative graveyard' MORE alone is not enough to win an election.

"With Hillary Clinton, we saw that just being against Trump isn't enough," Cooperman, who is a partner at Schoen Consulting, told Hill.TV's Joe Concha on "What America's Thinking."

“There is so much anger and passion in the Democratic Party right now to come out against Trump, but I do not think that will be enough," she continued. “The Democrats need more than just that, and they need to have ideas that they're articulating in terms of immigration and the economy."

Cooperman's comments come as Democrats prepare to face off against Republicans in the November midterm elections, with Republicans seeking to defend a narrow majority in the Senate and fend off Democrats trying to retake the House.

Democratic candidates and incumbents have recently lashed out against the Trump administration's controversial "zero tolerance" immigration policy that led to the separation of migrant families at the U.S.-Mexico border, among other criticisms.

— Julia Manchester