The U.S. Office of Special Counsel has cited Conway for multiple violations of the Hatch Act.
The House Judiciary Committee wants to hear from Annie Donaldson.
"We have been in private discussions with the special counsel's office," the California Democrat said.
The White House declined to confirm that Trump had sent a letter to Kim. It comes as nuclear talks between the U.S. and North Korea broke down after the failed summit between Kim and Trump in February in Vietnam.
(Bloomberg) -- President Donald Trump said people who will be apprehended by immigration agents starting next week are being deported for defying orders to return to their home nations after breaking the law to enter the U.S."They have to be removed from the country. They will be removed from the country