This was brought up by a site that cannot be linked here. This is what happened during prior impeachments of Spiro Agnew and Nixon....both times the Speaker of the House WOULD have become president if certain other events had transpired, but didn’t.

The other site wonders if this might shed some light on the game plan of the left.

This is from Wikipedia; about then-Speaker Carl Albert. Cut it up a bit for clarity and brevity. Can’t figure out how to correct the spacing—sorry!

From Wikipedia-CARL ALBERT Speaker of U.S. House of
Representatives

When Speaker John W. McCormack retired in January 1971, during the second half of Richard Nixon's first term as president, Albert was elected Speaker of the House of Representatives.

As the Watergate scandal developed in 1973, Albert, as Speaker, referred
some two dozen impeachment resolutions to the House Judiciary Committee for debate and study.[10]

In 1973, during Albert's second term as Speaker and Nixon's second term as president, Vice President Spiro Agnew was investigated for tax evasion and money laundering for a series of bribes he took while he was governor of Maryland. Agnew resigned as Vice President and eventually pleaded nolo contendere to the charges. This event put Albert next in line to assume the presidency should that office have become vacant. This was the first of the two times he would be in this position.

Under the provisions of the Twenty-fifth Amendment to the United States
Constitution, Nixon nominated Republican House Minority Leader Gerald R. Ford to succeed Agnew as Vice President in October 1973. As the Watergate scandal began to unfold and the impeachment process against Nixon began, it quickly became apparent that if Nixon resigned or was removed from office before Ford was confirmed by both houses, Albert would become Acting President under the Presidential Succession Act of 1947. Albert would have been forced to resign from the office of Speaker as well as the House.

This was the first occasion since the Twenty-fifth Amendment's ratification
when it was possible for a member of one party to assume the presidency
after a member of the opposing party vacated the office. As Speaker of the
House, Albert presided over the only body with the authority to impeach
Nixon and had the ability to prevent any Vice Presidential confirmation
vote from taking place in the House. This meant Albert could have
maneuvered to make himself Acting President. But he concluded that, as a
Democrat, he had no right to inherit a presidency that had been won by a
Republican ticket in 1972. He later said that if he had become Acting
President by succession that it would be in the national interest for him
to resign immediately after the House and Senate had confirmed a Republican Vice President.[citation needed] The Vice Presidency was vacant for about seven weeks; Ford was confirmed and sworn in December 1973.

Nixon resigned on August 9, 1974, and the office of Vice President was once more left vacant when Ford succeeded Nixon that day. This event put Albert next in line to assume the presidency for a second time. Former New York Governor Nelson Rockefeller was nominated by Ford, then confirmed and sworn into office as Vice President in December, settling the question of presidential succession.