HARRISBURG — Democratic Gov. Tom Wolf kept up pressure Wednesday to keep the 2010 federal health care law covering 1 million-plus Pennsylvanians, using his office to mount a vigorous public defense of it as efforts unfold in Congress to repeal it.

Wolf is in a prime position to help exert public pressure on Pennsylvania’s big delegation of Republicans in Congress. Only Texas and Florida send more Republicans to Congress than Pennsylvania’s 14, and only a couple of other Democratic governors hail from a state with a Republican congressional delegation of significant size.

Wolf’s administration has tried to make the case for the law in at least a half-dozen events in recent weeks, while Wolf’s public events on fighting Pennsylvania’s wave of heroin and prescription drug addiction often touch on the law’s crucial coverage of addiction treatment services. It also issued a 105-page report detailing the broad reach of the law’s coverage in the state.

The latest event, on Wednesday, joined three of Wolf’s Cabinet secretaries with people who had their story to tell about how the law known as ObamaCare or the Affordable Care Act had changed their life.

The event in the Capitol rotunda came a few days after top U.S. House Republicans unveiled a rough sketch of a plan that would mean dramatic changes to the law.

Wolf administration officials say highlighting the benefits of the law is driving up support for it.

“I think that everybody is doing their part, everyone’s saying, ‘stop and think about what’s going to happen,’” said Ted Dallas, Wolf’s secretary for the Department of Human Services. “This is not something you do for political reasons. This is a very serious thing. These are people’s lives, it’s their health, it’s their livelihood. A lot of people, if they don’t have health insurance, they can’t work.”