Voter Fraud

I guess this question is for the Democrats-

How in the world did this Democrat win 11% of the vote in a Democratic primary?

The man had been convicted of voter fraud- even if he won the election, he would not have been able to hold office.

MSNBC-

In Wyoming, popular incumbent Gov. Dave Freudenthal handily defeated challenger Al Hamburg for the Democratic nomination. Freudenthal received 89 percent of the vote against Hamburg, a retired house painter whose 1989 conviction for election fraud would have prevented him from holding office even if he won.

So how in the world does this man receive 11% of the votes from Democrats in spite of this?