Pakistani Premier Sworn In

ISLAMABAD, Pakistan -- Pakistani President Pervez Musharraf swore in Prime Minister Yousaf Raza Gilani on Tuesday as two senior U.S. officials arrived for talks that included Pakistan's role in the U.S.-led campaign against terrorism.

The new National Assembly overwhelmingly backed Gilani, a top official from assassinated opposition leader Benazir Bhutto's party, to become prime minister in a vote on Monday.

In apparent protest against Musharraf's participation, Bhutto's widower, Asif Ali Zardari, and their son, Bilawal Bhutto Zardari, who together lead her Pakistan People's Party, declined to attend the oath-taking ceremony at the presidency.

Gilani called for political parties to cooperate to solve looming problems, especially economic difficulties.

"All forces have to get together and bring the country out of these crises," Gilani, standing beside Musharraf, told reporters.

Musharraf's popularity has largely evaporated over the past year and his political allies were soundly beaten in Feb. 18 elections won by Bhutto's party weeks after she was assassinated.

Musharraf, a vital U.S. ally in the campaign against terrorism, has dismissed calls to step down. He offered Gilani support and also urged political forces to work together.

"A difficult era in terms of terrorism, extremism and the economy is ahead," he said.