The top Senate Republican said Thursday the GOP is "on a comeback" politically as Democrats scrambled to bury the hatchet after several days of intraparty squabbling over their chances to hold the House in November's elections.

House Speaker Nancy Pelosi, California Democrat, denied any friction with the White House, dismissing reports that she and her House colleagues are angry at the president for ignoring their interests.

"There is absolutely no reason to think that the White House has been anything but cooperative with us in terms of our political efforts to retain control of the Congress," Mrs. Pelosi told reporters...