Trump's misleading tweet on pre-existing conditions

President Trump claims the GOP health care bill being considered by the Senate would protect people with pre-existing conditions:

Fact check: The bill doesn't touch the Affordable Care Act's requirement that insurers offer coverage to sick people. But it does allow states to waive the ACA's ban on charging people with pre-existing conditions higher premiums than healthy people. States can also waive the requirement that plans cover certain benefits, which many sick people use and could thus have to pay for out-of-pocket.