FILE - In this Thursday, Aug. 17, 2017, file photo, U.S. Sen. Susan Collins, R-Maine, speaks to members of the media while attending an event in Lewiston, Maine. Collins said Sunday, Sept. 24, she finds it "very difficult" to envision backing the last-chance GOP bill repealing the Obama health care law. That likely opposition leaves the Republican drive to fulfill one of the party's premier campaign promises dangling by a thread. (AP Photo/Robert F. Bukaty, File)
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