|Majority Leader of the Kansas Senate|
January 9, 2017 – January 11, 2021
|Preceded by||Terry Bruce|
|Succeeded by||Gene Suellentrop|
|Member of the Kansas Senate|
from the 8th district
January 2013 – January 11, 2021
|Preceded by||Tim Owens|
|Succeeded by||Cindy Holscher|
|Member of the Kansas House of Representatives|
from the 19th district
|Preceded by||Dolores Furtado|
|Succeeded by||Stephanie Clayton|
|Born||August 13, 1956|
Great Bend, Kansas, U.S.
|Education||Fort Hays State University (BA)|
In 2010, Denning began to serve the Kansas House of Representatives, having defeated incumbent Democrat Dolores Furtado and representing District 19 from 2011 to 2013. Denning was succeeded by Republican Stephanie Clayton. He was first elected to the state Senate in 2012, with support from Governor Sam Brownback, the health care industry and the Koch brothers, defeating moderate Republican incumbent Tim Owens and was re-elected to the Senate in 2016. On December 5, 2016, Denning was elected as the Senate Majority Leader. The American Conservative Union gave him a lifetime evaluation of 79%.  In 2020, he worked with Democratic Governor Laura Kelly to craft a bipartisan Medicaid expansion plan. He said Wagle's tactics were crafted "without my input" nor did they reflect his plans, continuing, "Her statements are obstructive and not how we should be governing."
He is not seeking re-election in 2020.
Denning's wife is Marearl Denning. They have two children.
- "Senator Jim Denning's Biography". votesmart.org. Retrieved March 20, 2019.
- Biography. Retrieved 2 February 2017.
- 2012 Election results, Kansas Secretary of State, November 2012. Retrieved 2 February 2017.
- Denning, Jim, National Institute on Money in State Politics. Retrieved 2 February 2017.
- End may be coming for GOP moderates, Lawrence Journal-World, Scott Rothschild, July 22, 2012. Retrieved 2 February 2017.
- http://votesmart.org/candidate/125044/jim-denning#.UftVB2RxtHs Project Vote Smart]. Retrieved 2 February 2017.
- Kansas anti-abortion measure fails; Medicaid plan targeted Republican lawmakers in Kansas have failed to get a proposed anti-abortion amendment to the state constitution on the ballot, ABC News, John Hanna (AP), February 7, 2020. Retrieved March 14, 2020.
- "Kansas GOP leader pushing Medicaid plan not running again". Salina Post. May 8, 2020. Retrieved May 14, 2020.
- Johnson County Sheriff Frank Denning won’t run again, Kansas City Star, Roxy Hammill, JANUARY 5, 2016. Retrieved 2 February 2017.
| Majority Leader of the Kansas Senate