The super PAC aligned with House Speaker Paul Ryan, R-Wis., is yanking its support for Rep. David Young, R-Iowa, in retaliation for the Iowa Republican's opposition to his party's health care bill.

The Congressional Leadership Fund is closing down its field office and transferring staff from Young's swing district while canceling additional planned investments in his 2018 re-election.

The move, first reported by the Wall Street Journal's Reid Epstein, was announced Thursday, as President Trump and House Republican leaders struggled to secure enough GOP votes to pass the American Health Care Act.

"CLF spent $1.9 million on David Young's re-election last cycle, and given that he has decided he cannot support the president and House leadership," Corry Bliss, the group's executive director, told the Washington Examiner. "CLF has decided to close our office in his district and as of now we have no plans to spend any money on his race this cycle."

American Action Network, a political nonprofit and CLF's sister organization, has spent more than $10 million this year promoting the health care agenda supported by Trump and House Republican leaders.

Most of the advertisements run by AAN have been positive. Even ads targeting Republicans opposed to the AHCA have been mild-mannered in their attempt to encourage voters to pressure members to support the health care package.

But CLF's decision to pull out of Young's district, and risk giving Democrats the upper hand in the midterm, is intended to send a clear message that Republicans won't be able to vote against Trump and their leadership with impunity.

House Republicans have a majority of roughly 24 seats. Democrats are hoping to make gains in the midterm.

The vote on the ACHA, originally scheduled for Thursday, has been postponed. House GOP leaders and the White House were hopeful that they might have a deal sometime on Friday.