Congressional conservatives push showdown over Obama's executive action plans on immigration

Some conservative Republicans on Capitol Hill are spoiling for a fight with President Barack Obama over his plans to act unilaterally to protect millions of immigrants living here illegally from deportation.

They want to use upcoming spending bills to stop it.

In the Senate, Jeff Sessions of Alabama is among those arguing to use an upcoming must-pass spending bill to try to block Obama from acting on his own. A similar effort is taking shape in the House, where Rep. Matt Salmon of Arizona says more than 50 Republicans have signed a letter he's circulating.

GOP leaders appear cool to the effort since it could lead to a confrontation that, if taken far, could spark a government shutdown.