Some history to go along with the new law that allows Cory Booker to run for president or vice president in 2020 while simultaneously seeking re-election to the United States Senate.
No major party presidential nominee has ever run for two offices simultaneously.
Franklin Roosevelt, Alfred Landon, and Adlai Stevenson declined to seek re-election as governor of their respective states when they ran for president.
Bob Dole, whose Senate seat was not up for another two years, resigned his seat after he clinched the GOP presidential nomination.
Hedging bets is more common for vice presidential candidates.
Since 1960, five major party VP candidates have also run to keep their current office: Lyndon Johnson (1960), Lloyd Bentsen (1988), Joe Lieberman (2000), Joe Biden (2008), and Paul Ryan (2012).
Three others gave up their jobs after they were picked to be on the ticket: Reps. William Miller (1964) and Geraldine Ferraro (1984), both House members from New York; and Indiana Gov. Mike Pence (2016).
John Edwards (2004) had already announced he would not seek a second term to his North Carolina U.S. Senate seat when he sought the presidency.
The reality is that that if Booker captures the Democratic presidential nomination to run against Donald Trump next years, history predicts that he would drop his bid for a third term in the Senate if for no other reason than to obviate stories about his dual office seeking.
A version of this article originally ran on October 23, 2018.