A Republican member of the House is warning President Trump that his first term in office could be his last if the GOP's current healthcare measure becomes law.

During an appearance on CNN Wednesday night, Rep. Thomas Massie (R-Ky.) said that the plan to repeal and replace the Affordable Care Act (ACA) will only become less popular over time, further degrading its already tepid support.

"We're afraid he's a one-term president if this passes. We are trying to save him," Massie said. "The phone calls to my office are running 275 against versus four — only four votes from my constituents are in favor of this.

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"Voting for this is bad today, and it's going to be really bad in two or three years when the changes start kicking in and health insurance prices start going through the roof."

The measure has drawn the ire of many conservative members of Congress, who have argued that it does not go far enough to dismantle the ACA. Some, including Sen. Rand Paul Randal (Rand) Howard PaulSecond GOP senator to quarantine after exposure to coronavirus GOP senator to quarantine after coronavirus exposure The Hill's Morning Report - Sponsored by National Industries for the Blind - Trump seeks to flip 'Rage' narrative; Dems block COVID-19 bill MORE (R-Ky.), have taken to referring to the bill as "ObamaCare Lite."

Nevertheless, Trump has thrown his support behind the measure, urging lawmakers to swiftly pass the bill in order to fulfill a longtime campaign promise to do away with former President Obama's signature healthcare law.

Trump made repealing and replacing ObamaCare a cornerstone of his 2016 presidential campaign and is eager to make good on that promise.

Republican leaders unveiled several amendments to the bill on Monday in hopes of appeasing conservatives ahead of a key Thursday House vote. But the bill cannot afford more than 21 Republican defections, and as of Wednesday, 27 GOP House members stood opposed to the measure.