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WASHINGTON (AP) – Sen. Bill Cassidy will defend the Republican “Obamacare” repeal bill before a Senate panel on Monday. The Senate Finance Committee hearing is being held even though the measure’s prospects are dim.

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The Louisiana Republican sponsored the legislation with South Carolina GOP Sen. Lindsey Graham.

Republican Sen. John McCain said Friday he’ll oppose the bill in a Senate showdown this week. That means there will almost certainly be enough GOP opposition to sink it.

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Sen. Rick Santorum, a former GOP presidential contender, will also appear. He helped round up support for the proposal.

Democratic witnesses will include Cindy Mann, a former Obama administration health official.

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The GOP bill would abolish much of President Barack Obama’s 2010 health care overhaul and shift money and decision-making to the states.