TOPEKA, Kan. (AP) — The presumed Democratic nominee for Kansas governor is proposing to postpone future personal income tax cuts championed by Republican Governor Sam Brownback. Democratic challenger and Kansas House Minority Leader Paul Davis said Monday that he'd freeze existing income tax laws where they are now. That would block already-scheduled rate cuts. Brownback has said the tax cuts are stimulating the economy. Davis and other Democrats have called them reckless. Davis had a news conference at Piper High School in Kansas City, Kansas, and planned another in Wichita. He announced that former Lieutenant Governors Gary Sherrer and John Moore will serve as senior economic advisers to the campaign. Sherrer was a Republican and Moore was a Democrat. Both served as state commerce secretaries after lengthy business careers.