US Assistant Secretary of State Richard Boucher Tuesday urged Pakistan Muslim League-N Chief Nawaz Sharif to avoid any action against the President including his impeachment.During his meeting with Nawaz Sharif here at latter's farmhouse, Boucher said any decision of the President's fate be left up to him (President).The meeting discussed the tribal operation, judges' issue and President Pervez Musharraf's position.Mr Boucher and Nawaz Sharif said that only concerted efforts by the two countries could lead to a lasting peace in the troubled areas. Mr Sharif re-assured the visiting secretary of his party's support, but stressed the need for a wider dialogue between the Taliban and the government.Sources said the US Assistant Secretary's meeting with Nawaz Sharif was aimed at bringing the latter round to bring flexibility in his rigid stance over President Musharraf's position.