After Republican leaders expressed doubts about the stimulus package over the weekend, President Barack Obama pushes forward this week with efforts to build public support for his $825 billion economic recovery plan.

The push comes as more bad news is expected on the economic front with many U.S. companies expected to report earnings this week.

Obama outlined his stimulus plan in his radio address on Saturday and he is due to talk about jobs, energy independence and climate change at the White House at 10:30 a.m. (1530 GMT).

The White House event should result in more Bush reversals. Administration officials said Obama will direct the Environmental Protection Agency to reconsider a request by California — which was denied under the Bush administration — to impose its own strict limits on automobile carbon dioxide emissions.

If the EPA reverses the previous ruling, more than 12 U.S. states could proceed with plans to impose strict CO2 limits. California wants to reduce emissions by 30 percent by 2016.