Rather than opening a pathway for the president, Cantor’s defeat could push Republicans more to the right and harden the House GOP’s hostility toward the White House, virtually dooming Obama’s efforts to pass a legacy-building immigration bill or other major legislation.

Robert Gibbs, a longtime Obama adviser, said any glee at the White House over Cantor’s defeat was “quickly replaced by the reality that this is the end of anything productive getting done legislatively in Congress either this year or maybe for the next several years.”…

“It’s impossible to imagine the House moving forward on an explosive issue like immigration after what happened to Congressman Cantor,” said Jim Manley, a former adviser to Senate Majority Leader Harry Reid, D-Nev.