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Turning Point USA founder Charlie Kirk said Democrats would have supported the Republican tax law if President Obama had introduced it.

The bill received no Democratic support and several Republicans from New York, California, New Jersey and North Carolina rejected the legislation as well.

Kirk said he couldn't understand why people like Sen. Joe Manchin III (D-W.Va.) or Sen. Heidi Heitkamp (D-N.D.) didn't support the law.

He said that the Mountaineer State saw the highest GDP growth of any state, likely due to President Trump ending the 'war on coal,' and that Manchin should have recognized Trump's positive impact on his electorate.

"The Democrats would've supported this if President Obama introduced this bill," Kirk said.

Trump appeared to echo the sentiment, saying that Democrats "could've gotten a better deal" if they expressed more interest in working with the administration.

"I would've gone to Mitch [McConnell] and we could've worked something out," Trump said.

Kirk said Manchin, Heitkamp, and Sens. Jon Tester (D-Mont.) and Claire McCaskill (D-Mo.) will face uphill battles in their respective red states in 2018 if they continue to allow Democratic leader Sen. Charles Schumer (D-N.Y.) to dictate their party's votes as a bloc.

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