NEW: Obama facing dilemma over protectionism

WASHINGTON (AP) - Less than two weeks into office, President Barack Obama faces a dilemma contained in a massive economic stimulus bill: Backing protectionist measures that could set off a trade war, or opposing them, which could trigger a backlash from his supporters.
   
The choice involves “buy American” provisions attached to White House-backed stimulus legislation moving through Congress. They would require major public works projects to favor U.S. steel, iron and manufacturing over imports.
   
Some Democratic lawmakers and interest groups allied to the president support the measures. But international allies and trading partners are warning that favoring U.S. companies would breach U.S. trade commitments and could set off countermeasures around the world.
   
Asked about the protective provisions on Friday, White House press secretary Robert Gibbs would say only that the administration is reviewing them.