Contract reveals details of GOP plan to sue the president.
Virginia congressman warns of challenges ahead and calls for U.S. to lead.
The president visited Texas last week, but he chose not to go to the border, despite calls from members of Congress for him to do so.
Obama isn't the first president who has been sued, and some past cases have redefined the presidency
The president and the House Speaker buried their political differences to celebrate the world's most famous golfer
Pelosi says the GOP wants to head home for the year, Boehner counters that Obama is refusing to work with Republicans
House-approved bill now goes to President Obama for his signature.