Faced with the prospect of strong challenges from both sides of the aisle, Sen. Joe Lieberman (Party of One-CT) is set to announce this hour that he will not seek a fifth term in 2012. Word leaked out yesterday after Connecticut’s former Secretary of State, Susan Bysiewicz, announced that she would seek the Democratic nomination (see FDL’s coverage from Ryan, David, Teddy and Jon).

A Lieberman aide confirmed the motivational power of long odds to a Connecticut Fox affiliate, saying Joe-mentum “recognizes that it would be a tough fight.” For his part, however, the ever-pious Lieberman is expected to say that the fault lies not in himself, but in the stars:

He will quote Ecclesiastes — the passage: ‘To every thing there is a season and a time to every purpose under Heaven.’ So, after what will be 24 years in the Senate, and 40 years in public life, he believes that it is time for a new season and new purpose under Heaven for him.

Lame-ducking his last two years frees Lieberman to approach this session’s crucial debates on the budget deficit and war funding with a stronger focus on what has always mattered to the Senator: himself:

“He plans to spend the next two years focused on his work in the Senate. This decision frees him to be an honest broker between Democrats and Republicans, and to continue to do what he always does, which is to be a bipartisan bridge builder, and work across party lines, to put principle before partisanship,” the aide said. “He has a long record of getting things done for Connecticut and the country, and he is looking forward to having the freedom to do that in the next two years.”

In other words, prior to this decision, he wasn’t an honest broker? The truth shall set you free–or vice versa.

[Video feed--courtesy of Courant.com and WTIC--should begin at approximately 12:30 EST.]

Update 1:05pm EST: “Joey” has just finished speaking. He is indeed out after this term, though says this is not the end of his public life (McCain has already started the drumbeat for SecDef). He not only quoted Ecclesiastes, but Psalm 13, as well. . . oh, and he compared himself directly to JFK.