Protectionist Sentiments on the Rise

While 65 percent of union members say free trade has hurt the U.S., so do 61 percent of Tea Party sympathizers.

These constituents' work might skew towards industries dependent on the domestic market; therefore, cheaper foreign-made goods would make for an easy target.

Also interesting:

Democratic pollster Peter Hart and his Republican counterpart Bill McInturff, who conduct the NBC/WSJ poll, say the greatest shift against free trade has come among relatively affluent Americans, or those earning more than $75,000 a year.

The fact that protectionist sentiment is gaining ground among the affluent makes legislation much more likely,

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1'53% in US Say Free Trade Hurts Nation: NBC/WSJ Poll' - CNBC