ABC:

President Joe Biden’s warning last week that Vladimir Putin was “not joking” about possibly using nuclear weapons was “concerning” and counterproductive to bringing an end to Russia’s invasion of Ukraine, retired Adm. Mike Mullen said Sunday.

Mullen, the chairman of the Joint Chiefs of Staff under Presidents George W. Bush and Barack Obama, was asked in an interview on ABC’s “This Week” to assess the nuclear risk from Russia after Putin said he would use “all available means” to protect what he called his country’s territorial integrity.

“President Biden’s language — we’re about at the top of the language scale, if you will. And I think we need to back off that a little bit and do everything we possibly can to try to get to the table to resolve this thing,” Mullen told “This Week” co-anchor Martha Raddatz.