Vice President Biden 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 Anthony BookerDem presidential hopefuls seize on Trump border policy To strengthen our democracy, we need to remove obstacles that keep students from voting Members of Congress demand new federal gender pay audit MORE (D).

The VP was overheard referring to another Garden State politician with a one-syllable first name, Sen. Robert MenendezRobert (Bob) MenendezSchumer: Obama 'very amenable' to helping Senate Dems in midterms The Hill's Morning Report: Can Trump close the deal with North Korea? Senate must save itself by confirming Mike Pompeo 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.