Why there won't be a national unity government for now

At least two MK's (that I saw) called for a national unity government on Thursday - Zevulun Orlev (HaBayit HaYehudi) and Otniel Schneller (Kadima).I don't expect that to happen anytime soon. The pressure for a national unity government is only going to grow and Tzipi Livni is going to play it for all it's worth. For now, at least, I don't believe she'll go in without getting a rotating Prime