U.S. President Donald Trump faced two deadlines in Congress this week as Democrats prepared to shift the focus of their impeachment inquiry from fact-finding to the consideration of possible charges of misconduct over his dealings with Ukraine.

The Democratic-led House of Representatives Judiciary Committee, tasked with considering charges known as articles of impeachment, has given Trump until 6 p.m. EST (2300 GMT) on Sunday to say whether he or his legal counsel will participate in a Wednesday impeachment hearing.

This first-in-a-series of expected Judiciary proceedings will hear testimony on the impeachment process established under the U.S. Constitution from a panel of legal experts that has yet to be named.