(CNN) - President Obama warned Wednesday that failure to act immediately on his economic aid plan "will turn crisis into a catastrophe and guarantee a longer recession."
"Millions more jobs will be lost. More businesses will be shuttered. More dreams will be deferred," Obama said, as Senate debate continued on amendments to the stimulus package.
The House last week passed an $819 billion version of the plan, but no Republican voted in favor of it. The president has been trying to gain Republican support before the Senate votes on its version of the bill.
Debate on amendments to the bill is expected to last all week in the Senate. A vote could come as early as Friday.
Republicans are calling for a plan with more tax cuts and less spending. They also want more emphasis on helping homeowners. One Republican proposal could double the tax credit for home buying from $7,500 to $15,000.
Obama has said he wants to make sure Republican ideas are incorporated into the final legislation, but he said Wednesday that Congress should "not make the perfect the enemy of the essential" and brushed off recent criticism of the plan.