$2 million.
http://www.arkansasnews.com/archive/2005/04/29/News/320738.html"This is the largest penalty the election commission has levied upon a state party, commission records show. The previous commission record penalty upon a state party was $128,000 imposed on the Missouri Republican State Committee in 2004, and the New York Republican Campaign Committee in 1999, also $128,000."
"The party also accepted "excessive and prohibited contributions," failed to maintain required records and to submit required disclosure information to the commission, the audit found.
The party also failed to disclose specific information about a significant proportion of its contributions and spending during the 2000 election cycle, according to the audit. It also failed to properly report more than $600,000 in transfers received from Republican national party committees. The party also received $28,500 during the period in excessive contributions from individuals and $11,500 in contributions that were from sources prohibited under federal election law, the commission found."