Latinos and the Obama Administration

This article from today's Washington Post outlines the frustration Latino supporters have had with Mr. Obama.  Frankly, I'm not sure why the administration did not simply put forth an immigration bill and take the change of allowing the Republicans to vote it down.  Obama has a group of non-starters in congress, they will oppose anything he stands for simply to be contrarian.  Why not force them to put their positions and party on the line?