Senate Minority Leader Clint Stennett, D-Ketchum, is taking a temporary leave-of-absence to undergo brain surgery to help reduce swelling in his brain.
The Idaho Democratic Party made the announcement Monday afternoon.
The condition was discovered last week during a routine check-up. Stennett will have a "routine procedure" later in the week, according to a prepared statement.
While Stennett expects to recover and return to the Senate during the current term, he as recommended that Gov. C.L. "Butch" Otter name former Sun Valley mayor Jon Thorson, as his temporary replacement.
"This is one of those speed bumps that comes in life, but I am fortunate to have the support of my wife, Michelle, and my good friends in the Wood River and Magic valleys," Stennett said in a press release. "I'm very positive about my health and the future, and look forward to the day I can resume working for the people I represent in District 25."
Stennett is the state's senior elected Democrat. In his absence, Assistant Minority Leader David Langhorst, D-Boise, will take over Stennett's floor duties.