The SEIU issued an e-mail screed a few days ago, entitled “Joe Lieberman will hate this,” exclaiming: “Joe Lieberman is at it again. Jockeying for attention.”

Something tells me SEIU fell all over themselves when Lieberman was on the cusp of being elected vice president in 2000, but that was a long time ago I suppose.

Anyway, Lieberman, along with Democratic Sens. Ben Nelson of Nebraska, Blanche Lincoln of Arkansas, and Mary Landrieu of Louisiana are named in the e-mail as “targets” that may join a “Republican filibuster” of a Senate health care reform bill that tops the length of Pelosi’s monster 1,990 pager.

And that, to SEIU, is wholeheartedly unacceptable and likely downright un-American.

Announcing a program to deluge those senators with telephone calls, SEIU explains:

We elected Barack Obama, in part, by calling tens of thousands of voters in key “swing states.” This year is no different. Voters in Arkansas, Nebraska, Connecticut and Louisiana need to hear from us about what’s happening on health insurance reform. (emphasis added)

If the four senators don’t play ball, in the words of SEIU:

If that happens, health insurance reform will not move forward. (emphasis not added)

When asked about the consequences of such a filibuster, Lieberman told Politico:

“I don’t think about that stuff. I’m just — I’m being a legislator. After what I went through in 2006, there’s nothing much more that anybody [who] disagrees with me can try to do.”

It’s becoming increasing clear SEIU will stop at nothing, and beat down anyone standing in the way of the socialist Holy Grail of government-run health care.

So the signal from SEIU to these senators is fairly plain to see: You’ve Been Warned.