With today being National Iowa Day (at least for us political junkies), note this finding reported by The Hill newspaper [1]:
"A recent poll found that by 42 percent to 33 percent, Iowans favor a candidate who believes trade pacts hurt the U.S. economy rather than help it."
Trade was huge in the 2006 elections [2]. Looks like it could be huge in 2008.
Links:
[1] http://thehill.com/campaign-2008/top-democrats-ponder-changing-nafta-2008-01-01.html
[2] http://www.citizen.org/documents/Election2006.pdf