Because they are spineless cowards. Tax cuts are worth the literal threat of nuclear war? I mean, we have the answer. 
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"Little" Corker seems to have only one plan: To destroy
@realDonaldTrump 's Tax Reform Agenda. Maybe he wants a job at Clinton Foundation.Thanks. Twitter will use this to make your timeline better. UndoUndo
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Corker already said he was going to vote down tax cuts so its not like he's a team player
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He doesn't realize how stupid it was to ever pick a fight with Corker. He just sunk any chance he had at legislation getting passed.
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