Shas must join a Likud formed coalition for one reason: "Aryeh Deri".

In a few months time, Aryeh Deri will be bursting back onto the Shas scene and trying to wrest control away from Eli Yishai.

Aryeh Deri is a leftist. Eli Yishai is not.

If Shas is sitting with Kadima when Deri steps back into the picture you can bet that any chance of Shas sitting with the Likud is over, and Yishai will find himself kicked out of the picture. Deri will go to Rav Ovadia Yosef telling him that he has a better connection to his friends at Kadima than Yishai does.

But, if Shas is with the Likud, after Deri's latest anti-Bibi outburst (no matter how true), he won't be able to put forward that argument and Yishai's position is more secure. And they aren't likely to leave the coalition once in.

As for can they sit with Lieberman? They will sit with him either way (and they have).

But I still feel sorry for all those dupes that voted for Lieberman thinking he was a right-winger, and that by voting Lieberman they would definitely be part of a right-wing government.

Unfortunately the rest of the country has to pay for them being fooled.