Christopher Reed formally announced his candidacy to unseat Democratic U.S. Rep. Dave Loebsack of the 2nd Congressional District on Thursday, and in doing so vowed to run a less contentious campaign than he did in 2008 against Democratic U.S. Sen. Tom Harkin.

In that campaign, which Reed lost by more than 20 percentage points, the Marion Republican claimed that Harkin’s support for same-sex marriage also meant he supports marriage between “any 2, 3 or multiple people of any and all sexes. Heck, as far as he is concerned, you could marry your horse if it makes you happy.”

During a debate later in the campaign, Reed said Harkin had “an eight-year history of becoming the Tokyo Rose of Al-Qaeda and Middle East terrorism.”

In an interview Thursday with conservative blogger Craig Robinson, Reed said he learned a lot from his 2008 defeat and promises a campaign that focuses less on personal attacks and more on the issues.

“Last time, I took the race personally. This time, it’s about the people. So the vitriol and the remarks are not going to be there this time because there is too much at stake. This campaign has to be about defeating Dave Loebsack and what he votes for in Washington.”

Reed is expected to square off in a primary with Mariannette Miller-Meeks, the party’s 2008 nominee in the 2nd district, and Steve Rathje, who Reed defeated in 2008 for the right to take on Harkin.