After spending weeks dealing with the fallout from the IRS targeting scandal, Tea Party groups are starting to focus their energy on the immigration bill -- a development that could imperil President Obama's hopes for a speedy approval. Before adjourning for the Fourth of July holiday break, the Senate easily approved its version of the legislation. The bill now rests with the House, where Republicans say they will take up their own version. Obama, during his Africa trip, called on the House to "get this done" before the August recess. But House lawmakers already are hearing conservative calls to...