I hope they can do it, but many in Sharon's party voted against the plan, and they're now threatening to leave the party.
CS Monitor article.
Sharon got his slightly larger-than-expected margin of victory from the support of the opposition Labor party and other left-wing Knesset members. Many rebels in his Likud party voted against the plan.
Only minutes after the vote, Finance Minister Benjamin Netanyahu and three other Likud ministers raised questions about the future of Sharon's plan: he, Education Minister Limor Livnat, Agriculture Minister Yisrael Katz and Health Minister Dan Naveh threatened to resign within two weeks unless Sharon agrees to put his plan to a referendum. A junior coalition partner, the National Religious Party, is also threatening to bolt.