Subsequently, criticism grew in the CSU, where other politicians had to scale back their ambitions after Stoiber's decision to stay in Bavaria. On 18 January 2007, he announced his decision to stand down from the posts of minister-president and party chairman by 30 September. Günther Beckstein, then Bavarian state minister of the interior, succeeded him as minister-president and Erwin Huber as party chairman, defeating Horst Seehofer at a convention at 18 September 2007 with 58,1% of the votes. Both Beckstein and Huber resigned after the 2008 state elections, in which the CSU vote dropped to 43,4% and the party had to form a coalition with another party for the first time since 1966.