Vice President BidenJoe BidenHoyer: House will vote on COVID-19 relief bill Friday Pence huddles with senior members of Republican Study Committee Powell pushes back on GOP inflation fears MORE might have had the late Sen. Frank Lautenberg (D-N.J.) on his mind Thursday at the swearing-in ceremony for former Newark Mayor Cory BookerCory BookerMenendez reintroduces corporate diversity bill Democrats want businesses to help get LGBT bill across finish line Garland commits to combatting systemic racism MORE (D).

The VP was overheard referring to another Garden State politician with a one-syllable first name, Sen. Robert MenendezRobert (Bob) MenendezSenate confirms Thomas-Greenfield as UN ambassador The Memo: Biden bets big on immigration Biden pushes expanded pathways to citizenship as immigration bill lands in Congress MORE (D), as “Frank” while Booker was being sworn into the Senate.

"Come on up here, Frank," Biden said to Menendez, before correcting himself, "Bob."

Just moments earlier, Biden noted that Senator-elect Booker won the vote to replace Lautenberg, who died in June at the age of 89.