US VS. THEM:

President Obama's most aggressive and sustained legislative push since the Affordable Care Act faces a crucial first test this week, when a divided Senate considers a bill that would grant him accelerated power to finalize a massive trade accord with 11 nations across the Pacific Rim.

But after a lobbying campaign that has included giving members of Congress rides on Air Force One, pitching them at meetings in the West Wing, making private vows of political support and attacking publicly critics in his own party, Mr. Obama's top legislative priority remains at risk.

A vote scheduled for Tuesday on legislation granting him trade promotion authority, also known as "fast track," has become mired in a procedural thicket, with Democrats -- many of them loyal to labor unions bent on killing the bill -- vowing to oppose it.

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