Democrats and US President George W. Bush's Republicans grilled the top US commander in Iraq on Tuesday, questioning whether security gains were significant enough to keep US troops in the war zone.
General David Petraeus and US Ambassador to Baghdad Ryan Crocker insisted progress was being made under Bush's strategy of temporarily building up troops to allow time for Iraqi lawmakers to achieve political reconciliation.
But the bipartisan criticism directed at both men during congressional hearings raised questions about whether Bush could count on Republican colleagues for help in staving off Democrats' demands for a faster pullout.
Senator Chuck Hagel, a Republican critic of the unpopular war, struck at the heart of Bush's justification for increased force levels, asking why troops should stay when their presence had failed to lead Iraqi politicians to make needed compromises.
"Are we going to continue to invest American blood and treasure at the same rate we're doing now? For what? The president said, `Let's buy time.' Buy time? For what?" Hagel said.
Influential Republican Senator John Warner of Virginia, who last month urged Bush to send a message to Iraqi Prime Minister Nuri al-Maliki by withdrawing some US troops by Christmas, sounded deeply skeptical of current strategy.
"I hope in the recesses of your heart that you know that strategy will continue the casualties, the stress on our forces, the stress on military families, the stress on all Americans," he told Petraeus.
Warner asked if the general's recommendations would make the US safer -- a reference to Bush's argument that Iraq is a central front in the war on terrorism.
"Sir, I don't know, actually," Petraeus first replied, saying he was concentrating on his military mission in Iraq. When asked again by another senator, the general said the US had clear national interests in Iraq and achieving those interests had implications for US security.
Senator Gordon Smith, an Oregon Republican who joined war critics last year, said Petraeus' testimony appeared to secure Republican support for Bush. He predicted any legislation that set a withdrawal deadline would not pass.
Petraeus repeated his plan -- outlined on Monday -- to gradually pull out the extra 30,000 "surge" forces and bring troop levels down to between 100,000 and 130,000 by next summer.
He said he could not predict how quickly troop levels would fall after the summer. He also argued his force should still protect the Iraqi people, not focus solely on handing over to Iraqi forces and conducting counterterrorism missions.
Bush is expected to announce that 30,000 soldiers could return home next year in a nationally televised speech today on the divisive issue of US troop levels in war-torn Iraq.
Bush is expected to say that the "surge" could be trimmed by July next year, when just six months remain of his presidency, leaving the next stage of the conflict up to his successor amid a heated race for the White House.
The US president has long vowed to base his decisions about Iraq on the recommendations of military leaders on the ground.
But more than four years after the US-led invasion, Americans see an Iraq gripped by violence, sectarian strife and political corruption -- far from the ideal model of democracy in the Middle East that Bush had touted.
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