Sebelius named the 48-year-old McKinney to the $86,000-a-year post during a Statehouse news conference this morning. Jenkins is leaving the job after defeating Democrat Nancy Boyda for the 2nd District seat in Congress on Nov. 4.
A Greensburg Democrat, McKinney was appointed to the House in May 1992 and has been minority leader since 2002.
Sebelius said McKinney's familiarity with state budget issues made him a good choice for the position, calling him "a strong leader who cares about the obstacles Kansans face.''
Speculation was that Sebelius would pick a fellow Democrat to finish the remaining two years of Jenkins' term, serving until the next scheduled election in 2010.
The state law that gives the governor authority to name a replacement doesn't mention party affiliation.
Jenkins served in the Kansas House and Senate before being elected treasurer in 2002, defeating Democrat Sally Finney. Jenkins was elected to a second term in 2006, defeating Larry Wilson.
McKinney's replacement will be chosen by Democratic leaders in his district and take office in January.
(Copyright 2008 by The Associated Press. All Rights Reserved.)