The first such march was held the day after President Donald Trump's inauguration in 2017. Thousands of people were expected to turn out in hundreds of cities across the nation on Saturday.
Republican officials in a growing number of states say abortion is a nonessential procedure that can be delayed during the coronavirus pandemic; Democratic attorneys general are pushing back.
Groups opposed to abortion rights have signed a letter asking federal health officials to urge abortion providers to "cease operations" in an effort to preserve medical equipment.
The hearing on Thursday will use Missouri — where the last remaining clinic that provides abortion could close over a dispute with health regulators — as a case study.
The Trump administration's proposed changes to the federal Title X program would put the health of millions of low-income patients at risk, according to Planned Parenthood.
Abortion providers are far away for many women in the U.S., a report from the Guttmacher Institute finds. That's especially true for women in South Dakota and other states in the Upper Midwest.
A federal trial pits the last remaining clinic providing abortions in Kentucky against the state's Republican administration, which says the center failed to meet state health standards.
