He also said that Tea Party Republicans are "clearly in my camp."
Walden released a statement in response to Linthicum's announcement:
"I work hard every day to get results for Oregonians, and I look forward to earning their trust again next year," Walden said. "I remain focused on reducing the size and cost of government and growing Oregon’s economy to create jobs in the woods, on our farms, and in the high tech sector."
Walden's seat has been the target of conservative outside groups. The Club for Growth put Walden's seat on its "Primary My Congressman" list.