Union message from the outgoing president and a separate State of the Union speech by the incoming president. Since 1981, in recognition that the responsibility of reporting the State of the Union formally belongs to the president who held office during the past year, newly inaugurated presidents have not officially called their first speech before Congress a "State of the Union" message. Warren Harding's 1922 speech was the first to be broadcast on radio, albeit to a limited audience, while Calvin Coolidge's 1923 speech was the first to be broadcast across the nation. President Roosevelt's address in 1936 was the first delivered in the evening, but this precedent was not followed again until the 1960s. Harry S. Truman's 1947 address was the first to be broadcast on television. In 1968, television networks in the United States for the first time imposed no time limit for their coverage of a State of the Union address. Delivered by Lyndon B. Johnson, this address was followed by extensive televised commentary by, among others, Daniel Patrick Moynihan and Milton Friedman. Bill Clinton's 1997 address was the first broadcast available live on the World Wide Web. Ronald Reagan's 1986 State of the Union Address was the first to have been postponed. He had planned to deliver the speech on January 28, 1986, but it was delayed for a week following the Space Shuttle Challenger disaster that morning. Reagan instead addressed the nation from the Oval Office about the disaster. In 1999, Bill Clinton became the first president to deliver an in-person State of the Union address while standing trial for impeachment; the speech occurred the same day that Clinton's defense team made its opening statement in Clinton's impeachment trial, though he did not mention the proceeding. On January 23, 2019, the 2019 State of the Union speech by Donald Trump, originally planned for January 29 was canceled after an exchange of letters with Speaker of the House Nancy Pelosi in which she stated she would not proceed with a vote on a resolution to permit him to deliver the speech in the House chamber until the end of 2018–19 United States federal government shutdown. This decision rescinded an earlier invitation from the speaker, reportedly the first time in American history that a Speaker had "disinvited" the president from delivering the address. They later agreed to hold the speech on February 5. Delivery of the speech