He's facing a tough candidate in Bill Wivell. As County Commissioner over the past three years, Wivell has made it clear what he's against, but some Republicans have complained that it is less apparent what he is for. He's a hard worker though, and is good at generating core bases as demonstrated by his involvement with people in the remote Cascade community who are seeking greater representation.
The third Republican in the primary race is Nelson herself, whose presence assures Munson will be casting a long shadow over the race. Nelson backers hope Myers and Wivell will end up in a vote-splitting slugfest. She may be able to battle the Munson card by pointing out that some of the senator's most shameful displays of behind-the-scenes meddling and rumor-mongering have come at the expense of female candidates. If Munson can be framed as anti-woman when it comes to public office, any attempt to hurt Nelson could backfire.