As the coalitions often prove highly unstable - given the number and diverse views of the political parties involved - parties (or portions thereof) quite commonly leave them. However, so long as the coalition has at least 61 members (and it is free to recruit from parties not originally in the coalition) it is entitled to remain in power. Such a case occurred with the 19th Knesset: Ehud Barak and four other members left the Labor in 2011 to form the Independence Party, and continued their alignment with Likud, while the remaining eight Labor members remained with the party, but left the coalition; after all the changes, the Likud coalition retained the support of the minimum 61 members, and so, it remained in power. If a coalition fails a motion of no confidence, it ceases to be in power, unless the motion names a specific replacement to be the prime minister. That individual then has a prescribed amount of time to form a new coalition, and new elections are called if this attempt is not successful (known as a constructive vote of no confidence).