Sen. Joe Lieberman, I-Conn., today said an open mic moment involving President Obama and French President Nicolas Sarkozy was “insulting” to Israeli Prime Minister Benjamin Netanyahu and “totally unacceptable.”

“To me, it’s insulting to Prime Minister Netanyahu, who is obviously an ally of both France and the United States,” Lieberman said during an interview today with conservative radio host Sean Hannity. “It’s totally unacceptable, totally offensive.”

Lieberman was reacting to an open mic moment  at the G-20 meetings last week in France, where Obama and Sarkozy discussed Netanyahu, thinking a microphone was turned off.

“I can’t see him anymore, he’s a liar,” Sarkozy said in French.

“You may be sick of him, but me, I have to deal with him every day,” President Obama replied, according to reports.

While admitting that Sarkozy’s comments calling Netanyahu a “liar” were worse, Lieberman said he is disappointed in President Obama’s reaction.

“I was disappointed by President Obama’s response because I wish he had, in some measure, come to the defense of Bibi Netanyahu,” Lieberman said.

The White House has declined to comment on the exchange.