Sen. Al Franken (D., Minn.) wrote in his new memoir that President Donald Trump demanding an investigation into fraudulent votes reminded him of O.J. Simpson being acquitted.

Al Franken: Giant of the Senate is described as a "candid personal memoir" that details the senator's life from "Saturday Night Live" to his time in Congress, Axios reported. The book is set to be published on Tuesday.

In his memoir, Franken described Trump insisting on an investigation into potential fraudulent votes after the 2016 presidential election. The Minnesota Democrat compared the situation to the highly televised acquittal of O.J. Simpson in 1995.

"When Trump demanded an investigation into those millions of fraudulent votes, it reminded me of O.J. Simpson, who, after being acquitted of murdering his ex-wife and Ron Goldman, vowed to spend the rest of his life ‘finding the killer or killers,'" Franked wrote.

Franken, a known comedian, also said the funniest Republican in the Senate is Sen. Lindsey Graham (R., S.C.).

"In 2016, Lindsey ran for president, and found himself somewhere around fifteenth in a field of seventeen. Running into him in the senators' bathroom, I told him, ‘Lindsey, if I were voting in the Republican primaries, I'd vote for you.' … [W]ithout hesitation, he replied, ‘That's my problem,'" Franken wrote.