The pact sets out a three-year timetable for US troop withdrawal. A public referendum on it will be held in July.
Wednesday's vote on a security pact to allow US troops to remain in Iraq for three more years is being seen as a referendum on Prime Minister Maliki's performance.
Amid growing opposition, Iraqi Prime Minister Nouri al-Maliki called on Sunday for more time to negotiate a plan that could begin US troop withdrawals in June 2009.
In another nod to the West, Syria also sent an ambassador to Iraq – the first in decades.
At a United Nations conference in Sweden Thursday, Iraq appealed for debt forgiveness to boost development.
President Mahmoud Ahmadinejad met with key Iraqi leaders and offered the country a $1 billion loan as he began a two-day visit Sunday.
President Bush wants a limit to the Turkish campaign against rebels, but Turkey says no to a timetable.
The Secretary of State paid a surprise visit Tuesday amid signs that political reconciliation is gaining some traction in Iraq.