In light of President Obama's decision to delay his much-anticipated edict on immigration until after November's elections, some critics are asking why the president and Democrats in Congress didn't pass immigration reform back when they had overwhelming majorities in both House and Senate.As a presidential candidate, Obama promised to "put comprehensive immigration reform back on the nation's agenda during my first year in office." After victory in 2008, he had the clout to do so: sky-high approval ratings, 257 Democrats in the House and, for a while, a filibuster-proof majority of 60 Democrats in the Senate.And yet, immediately after being sworn in, Obama began to send subtle signals that immigration reform wasn't a top priority. "We've started to talk to all the parties involved and both parties here in Washington about the prospects of taking legislative steps," Obama said.