One of the significant concerns about Barack Obama's health plan is that he might require large and medium companies to contribute as much as 6% of their payrolls to cover healthcare benefits for their workers. Obama would also prohibit insurers from rejecting applicants because of medical conditions, require health insurance for children, and create a new federal health plan to provide comprehensive coverage to the uninsured. Those beneath certain income levels would be granted tax credits to make premiums affordable, and small businesses would be offered tax credits to provide benefits.