In this July 27, 2017 file photo, Sen. Ron Johnson, R-Wis. listens as Sen. John McCain, R-Ariz. speaks on Capitol Hill in Washington.  Johnson suggested that John McCain's brain tumor and the after-midnight timing of the vote were factors in the Arizona lawmaker's decisive vote against the GOP health care bill. In a radio interview, Johnson answered questions about the collapse of the years-long Republican effort to repeal and replace Barack Obama's Affordable Care Act, his criticism of the process and McCain's dramatic vote.  (AP Photo/J. Scott Applewhite)
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