Karl Rove and his aides at the White House have regularly used email accounts provided by the Republican National Committee to send and receive emails that should have been sent and received on the official White House system under the Presidential Records Act. When Sen. Leahy asked Taylor about this, she said that the email system had been created in order to avoid violations of the Hatch Act, which prohibits the use of government resources for political means.
This is a companion discussion topic for the original entry at https://talkingpointsmemo.com/?p=180415