WASHINGTON - Top House Democrats retreated Monday from an attempt to limit President Bush's authority for taking military action against Iran as the leadership concentrated on a looming confrontation with the White House over the Iraq war.

Officials said Speaker Nancy Pelosi and other members of the leadership had decided to strip from a major military spending bill a requirement for Bush to gain approval from Congress before moving against Iran.

Conservative Democrats as well as lawmakers concerned about the possible impact on Israel had argued for the change in strategy.

The Iran-related proposal stemmed from a desire to make sure Bush did not launch an attack without going to Congress for approval, but drew opposition from numerous members of the rank and file in a series of closed-door sessions last week.

Rep. Shelley Berkley (news, bio, voting record), D-Nev., said in an interview there is widespread fear in Israel about Iran, which is believed to be seeking nuclear weapons and has expressed unremitting hostility about the Jewish state.

"It would take away perhaps the most important negotiating tool that the U.S. has when it comes to Iran," she said of the now-abandoned provision.

"I didn't think it was a very wise idea to take things off the table if you're trying to get people to modify their behavior and normalize it in a civilized way," said Rep. Gary Ackerman (news, bio, voting record) of New York.