Sen. Susan Collins, R-Maine, smiles as she is followed by former Senate Majority Leader Bill Frist, a Republican from Tennessee, who is visiting the Capitol in Washington, Thursday, Dec. 14, 2017. As lawmakers craft a temporary spending bill to keep the government from shutting down, Sen. Collins has demanded a pledge from President Donald Trump that he honor subsidies for low-income people participating in the Affordable Care Act in exchange for her commitment to support the Republican tax measure. (AP Photo/J. Scott Applewhite)

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