Question: The Democratic nominee for a US Senate seat in Missouri in 2016 defeated what Republican politician in 2012?

Context articles: Missouri Secretary of State election, 2012
United States Senate election in Tennessee, 2006
Virginia gubernatorial election, 2001
Robert L. Smith
Donald A. Callahan
California gubernatorial election, 1990
David L. Williams (politician)
Harold Ford Jr.
Jack Hawley
Jason Kander

The Missouri Secretary of State election, 2012 was held on November 6, 2012, alongside the presidential and gubernatorial elections. Democratic State Representative Jason Kander defeated Republican Speaker Pro Tem Shane Schoeller by 39,085 votes.
The 2006 United States Senate election in Tennessee was held on November 7, 2006.
 The election winner, Bob Corker, served his term between January 3, 2007 and January 3, 2013.
 Corker replaced Republican Bill Frist in the Senate, who retired upon the end of his second term in 2007.
 Corker was the Republican nominee, and the Democratic nominee was Harold Ford, Jr..
 The race between Ford and Corker was one of the most competitive Senate races of 2006, with Corker winning the race by less than three percent of the vote.
 Corker was the only non-incumbent Republican to win a U.S. Senate seat in 2006.
 Since 1994, the Republican Party has held both of Tennessee's Senate seats.
The 2001 Virginia gubernatorial election was held on November 6, 2001.
 Incumbent Republican Governor Jim Gilmore was barred from seeking a second term; Democratic nominee Mark Warner, the 1996 Democratic nominee for the U.S. Senate, defeated Republican nominee Mark Earley, the Attorney General of Virginia.
Robert L. Smith (born May 1931) was a Republican politician from Idaho.
 Smith was the 1974 Republican nominee for the United States Senate seat in Idaho.
 He was defeated by Democratic incumbent Frank Church.
Donald A. Callahan (born 1876) was a Republican politician from Idaho.
 Callahan was the 1938 Republican nominee for the United States Senate seat in Idaho.
 He was defeated by Democratic Congressman D. Worth Clark.
The 1990 California gubernatorial election was held on November 6, 1990.
 The Republican nominee, Senator Pete Wilson, defeated the Democratic nominee, former San Francisco Mayor Dianne Feinstein, who would later go on to win Wilson's Senate seat.
David Lewis Williams (born May 28, 1953) is an American attorney, Republican politician, and judge from the U.S. state of Kentucky.
 From 1987 to 2012, Williams represented Senate District 16, a position he secured upon the retirement of fellow Republican Doug Moseley.
 When Republicans gained control of the state senate in 2000, Williams was chosen as President of the Senate, and held that post continuously until his resignation in November 2012.
 In September 2010, he announced his candidacy for the Republican nomination for governor in the 2011 gubernatorial election.
 On May 17, 2011, Williams secured the Republican nomination over Tea Party movement-backed Phil Moffet.
 However, he lost the general election by twenty points to incumbent Democratic Governor Steve Beshear.
 In November 2012, Williams resigned his Senate seat to accept a circuit court judgeship.
Harold Eugene Ford Jr. (born May 11, 1970) is an American politician and author who served five terms in the United States House of Representatives as a member of the Democratic Party from  's 9 congressional district , centered in Memphis, from 1997 to 2007.
 He is the son of former Congressman Harold Ford Sr., who held the same seat for 22 years.
 In 2006, Ford made an unsuccessful bid for the US Senate seat vacated by retiring Bill Frist.
 He is a member of the Ford political family from Memphis.
 Ford was the last chairman of the Democratic Leadership Council (DLC).
John Thomas "Jack" Hawley (June 16, 1920 – December 20, 1999) was a Republican politician from Idaho.
 Hawley was the 1962 Republican nominee for the United States Senate seat in Idaho.
 He was defeated by Democratic incumbent Frank Church.
Jason David Kander (born May 4, 1981) is an American lawyer and politician.
 A member of the Democratic Party, he was elected Secretary of State of Missouri in 2012, serving from 2013 to 2017.
 He previously served as a state representative.
 He was an intelligence officer in the Army National Guard, achieving the rank of Captain.
 He was the Democratic nominee for the United States Senate, narrowly losing the 2016 Senate election to Republican incumbent Roy Blunt.