Having an election for Part Leader within less than two months is extremely fast according to Israeli standards. The opponents do not have time to organize and the incumbent gets a big advantage. Netanyahu is opposed by Ya'alon to his right and Shalom on the left (relatively speaking, both are Likudniks). By comparison, Labor took over 6 months to go through their recent elections, and Kadima also took a few months following Olmert' decision to hold internal elections. Typically, the major rivals agree on some date acceptable to all. Well, not BibiYahoo.
ISIS kills 22 in Yemen's Sanaa, Aden; targets both gov't and Houthi rebels (Reuters)
from the article: By moving up Likud primary, Netanyahu out to clean house