Clinton 2016 campaign manager cautions against exit polls: 'They may break your heart'

Robby Mook, the former campaign manager for Hillary ClintonHillary Diane Rodham ClintonBiden to debate for first time as front-runner Top Trump ally says potential Amash presidential bid could be problematic in Michigan Chaotic Trump transition leaks: Debates must tackle how Democrats will govern differently MORE's 2016 Democratic presidential bid, cautioned ahead of Tuesday's midterms to treat exit polls "like online dating profiles."

"Things may not be as they appear. And they may break your heart," Mook wrote on Twitter.

Mook's warning came as results began trickling in from initial exit polls early Tuesday evening.


A preliminary CNN poll showed that 44 percent of voters approve of President TrumpDonald John TrumpNew EPA rule would expand Trump officials' powers to reject FOIA requests Democratic senator introduces bill to ban gun silencers Democrats: Ex-Commerce aide said Ross asked him to examine adding census citizenship question MORE's job performance, while 55 percent disapprove. The same initial exit poll found two-thirds of voters said Tuesday's vote was about Trump's presidency.

An Associated Press survey conducted with NORC at the University of Chicago found that health care and immigration were the two most important issues to voters in Tuesday's midterm elections.

Each of those preliminary results were released before the first polls closed across the country, and are therefore subject to change. Democrats are seeking to retake the majority in the House and Senate in Tuesday's elections. Political forecasters give them a strong chance of retaking the lower chamber.

Exit polls in the 2016 presidential election showed Clinton with a lead over Trump, and prognosticators heavily projected that the Democratic nominee would prevail.

But Trump ultimately won the Electoral College, 304-227, but lost the popular vote by nearly 3 million votes.