Major health care reform negotiations continue in Washington on Monday.

First up on the slate is the issue of a public option in the proposed health care measure.
    
The White House and lawmakers are facing a huge challenge.  They must try to blend five House and Senate committee versions of the health care package.

White House Chief of Staff Rahm Emanuel said President Obama "will obviously weigh in when it's important to weigh in"on the possibility of a public option.
    
Near unanimous Republican opposition is expected.
    
Senators are focusing on two bills from the finance and health committees. The two committees disagree on whether to include the public option.

House Democrats are insisting on the government-run plan, which was approved last week by the Senate Finance Committee.