The resolution for civil enforcement of the subpoena instructs the Senate legal counsel to bring a lawsuit in the District Court for the District of Columbia to require de la Torre’s testimony before the committee.
The criminal contempt resolution would refer the matter to the U.S. attorney for the District of Columbia to criminally prosecute de la Torre for failing to comply with the subpoena.
They can just ignore the law and nothing happens.
Same goes for NY.
I know this because at the college I worked at, a city public safety officer walked up to a young man who was sunbathing on campus thinking it was a woman, and told him to put his shirt back on or be charged with indecency or something. The school was outraged and had a shirtless demonstration march around town.
Did a I mention it was an all girls school?