President Barack Obama is ready to sign landmark health care legislation into law today, but the work is far from over.He also plans to make trips around the country, starting with Iowa Thursday, to persuade skeptics that the medical system remake will make their lives better.But first Obama will surround himself at the White House with aides, Cabinet members and Democratic leaders who helped pushed the bill through.Republicans say they'll continue to fight it in whatever forum is appropriate, including the courts. The bill will extend coverage, over time, to 32 million uninsured Americans. It also will prohibit industry practices such as denying coverage to people with existing medical problems.A companion measure House Democrats approved to make a series of changes is due for consideration in the Senate.Republicans plan to load up the bill with scores of amendments.