But he was equally realistic about the fierce partisanship on Capitol Hill.
"Well, let's make sure that it doesn't have to be proposed," McDonough said of the president's pitch, first reported on USA Today's website late Saturday.
Even so, the administration is moving forward on its own immigration agenda should one of Obama's top priorities get derailed.
The administration's proposal would create a visa for those in the country illegally and allow them to become legal permanent residents within eight years. The proposal also requires businesses to know the immigration status of their workers and adds more funding for border security.
It drew immediate criticism from Sen. Marco Rubio, R-Fla., one of the eight lawmakers searching for a comprehensive plan.
"If actually proposed, the president's bill would be dead on arrival in Congress, leaving us with unsecured borders and a broken legal immigration system for years to come," said Rubio, who has been a leading GOP spokesman on immigration.