Elijah Cummings
The president is scheduled to speak at the House Republican Conference retreat this week despite his previous insults.
Congress is already looking into various ways the Trump administration has sought to direct business to the president's properties.
Whether the president violated the Constitution by pitching his Miami resort for the next G-7 summit is also under review.
Oversight Committee Chair Rep. Elijah Cummings said DHS is blocking staff from visiting facilities after previous inspections revealed mistreatment of migrants.
WHAT'S HAPPENING
“I want him to come and look at my entire city. I’ll ride with him for hours if he asked to,” the Maryland congressman said of the president.
“This is the behavior of a jerk, a clod, a dolt, a schmuck."
Calling the president a POS was "mistaken," the EGOT winner clarified. "At least excrement has a useful biological function."
"Too bad!" Trump tweeted about the burglary of Cummings' home in Baltimore.
The congressman's home was broken into hours before Trump began tweeting racist insults about Cummings and his majority-black House district.
The House speaker says Trump's son-in-law and White House adviser knows all about the rodent infestations in Baltimore that the president has griped about.