Senate Majority Leader Mitch McConnell is about to face alegacy-defining test of whether he can keep his unruly caucus inline to deliver President Donald Trump's coveted goal of“massive tax cuts” in 2017.

He needs 50 of 52 members, and they have a variety of competingdemands. Some want to limit new deficits, while others want todeepest tax cut possible; some prioritize family tax breaks whileothers want to give businesses a boost; some have parochialconcerns while others tend to be notoriously difficult to win onmajor pieces of legislation.

Senate Majority Whip John Cornyn says he wants a floor vote theweek of Nov. 27. That's two weeks away. Here are the factionsMcConnell and his team have to navigate:

The Fiscal Skeptics

The tax plan going before the Senate Finance Committee Mondaywould increase the federal deficit by about $1.5 trillion over thenext decade—before accounting for any economic growth that it mightspur. That complicates the plan's prospects among someRepublicans.

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