For those of you who insist on believing that Joe Lieberman is still something other than a Senatorial colleague of Barack Obama, that he continues to be some kind of mentor to Senator Obama, welcome news that Obama isn't afraid to call Lieberman on his Joementum.

Sen. Joe Lieberman, the self-described "Independent Democrat" who caucuses with the Democratic party in the Senate even though he has endorsed Sen. John McCain, R-Ariz, got some tough talk from Sen. Barack Obama, D-Illinois, yesterday about his advocacy for the presumptive Republican presidential candidate and the general tone of the campaign, Democratic sources tell ABC News.

Returning to the Senate after his securing the Democratic presidential nomination, Obama and Lieberman greeted each on the Senate floor in the Well as they were voting on the budget resolution.

They shook hands. But Obama didn’t let go, leading Lieberman - cordially - by the hand across the room into a corner on the Democratic side, where Democratic sources tell ABC News he delivered some tough words for the junior senator from Connecticut, who had just minutes before hammered Obama's speech before the pro-Israel group AIPAC in a conference call arranged by the McCain campaign.  Read more…