Illinois Secretary of State Alexi Giannoulias' office is investigating whether other Illinois police departments are breaking a state law that bars them from sharing data with outside agencies tracking people for their immigration status or for seeking an abortion.

House Oversight Chair James Comer requested in April that these Democratic governors testify, claiming that the "Trump administration is taking decisive action to deport criminal illegal aliens from our nation, but reckless sanctuary states like Illinois, Minnesota, and New York are actively seeking to obstruct federal immigration enforcement."

The hearing comes amid heightened tensions and protests over President Donald Trump's stepped-up enforcement of immigration laws.

As Donald Trump revamps his promised nationwide crackdown on immigration, federal authorities are taking more aggressive measures to detain immigrants.

Amid unrest in California, Republicans plan to press the governors of other blue states on their immigration policies, including on limiting cooperation with federal enforcement efforts.

The Trump administration has a novel strategy to boost arrests and reduce courts' backlog: dismissing people's immigration cases and immediately arresting them.