President Obama and his aides will seek to rally public support for his embattled health care plan in the coming weeks, starting with a White House event Tuesday. Obama will promote the effort in a speech while surrounded by people who have benefited from the new law, according to an addition to the White House schedule. The Affordable Care Act has come under heavy political attack since its rollout in October. Problems have included a malfunctioning website and the cancellations of polices that do not meet new federal standards. In the coming days, Obama and aides will highlight what they call successful aspects of the law.