Kansas Secretary of State Ron Thornburgh deserves Kansans' thanks for his solid service during 15 years in his job and remarkable 25 years in the office, where he started as a student intern. Thornburgh, who has resigned to take a sales and marketing job in Olathe, stood firm against the political winds within his own party, including primary challenges from Republicans. His leadership nationally on voting reform and digital services was impressive. What he's done to enable and promote advance voting and electronic filing for businesses will have lasting impact. Politically, Thornburgh's resignation potentially changes what already was a competitive contest. If Gov. Mark Parkinson appoints one of the Democrats interested in running for the job, state Sen. Chris Steineger, of Kansas City, Kan., or Securities Commissioner Chris Biggs, that incumbency could help on Election Day.