Gov. Mark Dayton underwent what a spokesman called "elective lower back surgery" Monday at the Mayo Clinic in Rochester. 

Dayton's office said in a news release that the three hour surgery was successful, and that Dayton is now "resting comfortably." 

The surgery was similar to one he had three years ago, when doctors fused two vertebrae in Dayton's lower back, aiding strength and stability in his legs, according to a news release. 

A spokesman said Dayton is expected to resume his schedule next week. 

A meeting scheduled for Monday with House Speaker Kurt Daudt, R-Crown, and Senate Majority Leader Tom Bakk, DFL-Cook, about a potential special legislative session to help out-of-work steelworkers and to address widening racial disparities in income and education, has been postponed, according to his staff.