IMPEACHMENT ONLINE EXTRA: Then and now — how Trump impeachment hearing is different

FILE - In this Aug. 3, 1973, file photo, the Senate Watergate Committee hearings continueon Capitol Hill in Washington. From left are: Sen. Lowell P. Weicker, Jr; Sen. Edward J. Gurney, Fred Thompson, Sen. Howard H. Baker, Jr; Rufus Edmisten, Sen. Sam Ervin; Sam Dash, Sen. Joseph M. Montoya, Sen. Daniel K. Inouye was absent. Testifying is Lt. Gen. Vernon Walters. In 1973, millions of Americans tuned in to what Variety called "the hottest daytime soap opera" _ the Senate Watergate hearings that eventually led to President Richard Nixon's resignation. For multiple reasons, notably a transformed media landscape, there's unlikely to be a similar communal experience when the House impeachment inquiry targeting Donald Trump goes on national television starting Wednesday (AP Photo/File)
FILE - In this Nov. 19, 1998 file photo, Independent Counsel Kenneth Starr holds up his report while testifying on Capitol Hill, before the House Judiciary Committee's impeachment hearing. (AP Photo/Joe Marquette)

WASHINGTON — The public impeachment inquiry hearings this week usher in a rare and momentous occasion in American history as Congress debates whether to remove a president from office.