Envoys of Western countries have stepped up consultations with leaders of the Pakistan People's Party and Pakistan Muslim League-Nawaz, which are set to form a coalition in Pakistan, apparently to shore up the position of President Pervez Musharraf [Images] amid mounting uncertainty over his political future.

Eight years after he seized power by deposing former premier Nawaz Sharif, Musharraf is facing the possibility of impeachment if opposition parties are able to unite to achieve a two-thirds majority in the National Assembly or Lower House of Parliament.

Sharif, the chief of PML-N, is among those leading the charge against Musharraf, and has repeatedly called for the former military ruler to accept the people's mandate in Monday's general election and step down.

The election results, he said on Friday, also showed that Pakistanis no longer wanted "US influence in the country".

Though the PML-N and PPP do not have a two-thirds majority in Parliament, having bagged about 200 seats in the 342-member National Assembly, they could reach the magic figure if they rope in other groups like the Awami National Party and independents.

Since the PPP emerged as the largest party in the February 18 polls, US Ambassador Anne Patterson has met Zardari at least two times.

The first meeting on Wednesday even raised eyebrows as Zardari went to the US embassy to meet the envoy, sparking criticism from politicians.

British High Commissioner Robert Brinkley has also met leaders of the PPP and PML-N, including Sharif.

Sources said the Western envoys have urged the PPP and PML-N to try to co-exist with Musharraf for some time to ensure a "smooth transition" in the interest of stability in Pakistan, a key US ally in war on terror.