Since leaving Capitol Hill in 1999, former Representative Robert L. Livingston has been the main lobbyist for Turkey in blocking Congressional efforts to pass an Armenian genocide resolution.

After succeeding twice before — and collecting more than $12 million in fees for his firm, the Livingston Group — he is pushing once again for his client.

In recent months, Mr. Livingston, a Louisiana Republican who was once speaker-designate of the House, has consulted with Vice President Dick Cheney and with Karl Rove, when he was still the top White House political strategist. He escorted Turkish dignitaries to Capitol Hill to warn that the resolution threatened to destroy a strong Iraq war alliance....

As Turkey reacted angrily to the House committee action in the last few days, members began responding to arguments that the resolution posed a national security threat. Those arguments were put forth by the Bush administration, Mr. Livingston and another prominent lobbyist, Richard A. Gephardt, of Missouri, the former House majority leader and a Democrat.

The issue has pitted Turkey’s money and high-placed connections against a persistent and emotional campaign by Armenian-American citizens’ groups.