Most Americans want to keep the law, but many want to see changes made
Though Republicans control both houses of Congress, many have stayed silent
Throws full weight behind plan to replace Obamacare, battling resistance from his own party
Republicans say they've not yet received an estimate of the bill's overall cost
Bill is set to be introduced on wednesday that would lift restrictions on insurers: Media reports
The stakes could hardly be higher for 22-30 million Americans at risk of losing health insurance
No Democrats supported the initiative. Nine Republicans voted against the measure
Persistently rising drug prices have imposed a heavy burden on consumers
Trump's repeated attacks on the law were a central focus of his campaign
Obama defends his legacy on health care reform, pushing back against the Republican Party, which has called for a full repeal of 'Obamacare'