LaHood ran for Peoria Countystate's attorney in 2008, losing to incumbent Kevin Lyons by a margin of 43,208 to 36,449. He was also involved in several other Republican campaigns, including Bill Brady's 2010 campaign for governor and Dan Rutherford's campaign for Illinois Treasurer. LaHood was appointed to the Illinois Senate on February 27, 2011, at the age of 42. He took office March 1, the day afterDale Risinger retired. When appointed, LaHood announced he would run for election to a full term in 2012, which he won, running unopposed.
U.S. House of Representatives
2015 special election
On July 7, 2015, LaHood defeated Mike Flynn 69%-28% in the GOP Primary to become the Republican candidate for Illinois's 18th congressional district, replacing Aaron Schock. He faced the Democratic candidate Rob Mellon in the September 10 special general election, easily defeating him with a large percentage of the vote. He was sworn in by House Speaker John Boehner on September 17, 2015.
LaHood on the House Ways and Means Committee. On May 25, 2016, LaHood introduced legislation through the Science, Space, and Technology Committee that approved the Networking and Information Technology Research and Development Modernization Act of 2016. The NITRD Program was originally authorized by the High Performance Computing Act of 1991. NITRD is the federal government's primary research portfolio on transformative high-end computing, high-speed networking, high capacity systems software, cybersecurity, and related advanced information technologies. Darin LaHood drew criticism from constituents for declining to hold an open town hall during the February 2017 recess. Constituents from across the 18th congressional district gathered in Bloomington Normal and Jacksonville to request a town hall to discuss a variety of issues, including access to health care, immigration laws, and the freedom of the press. LaHood spoke to the demonstrators outside the Farm Bureau building in Peoria who had come to push for a town hall, LaHood stated, "We live in a democracy, people may not always agree with me and that's why I have to go before voters like I did in November. I was fortunate to receive 72 percent of the vote in that election. But this is part of the process." LaHood is a member of the Republican Main Street Partnership. He is a member of the Republican Study Committee.
LaHood believes that humans "play a role" regarding climate change and that there is "no doubt about that." Despite this, LaHood has a 0% lifetime rating from the League of Conservation Voters, indicating consistent votes against environmental causes.
Health care
LaHood opposes "able-bodied working men" from accessing Medicaid. He supports the full repeal of the ACA. Regarding single-payer healthcare, LaHood would consider a bill if it was "fiscally sound" and benefited his constituents.
LaHood opposes net neutrality and believes that revoking it has "zero effect" on privacy or data collection.
Economic issues
Tax reform
LaHood supports tax reform, specifically around corporate loopholes. In April 2017, he stated he would not vote for any tax cut bill unless it was "revenue neutral" so it would not add to the deficit. In December, LaHood voted for the Tax Cuts and Jobs Act of 2017, which, according to the Congressional Budget Office, will add $1.414 trillion to the national debt.
International issues
Immigration
LaHood supports immigration reform, including shortening the time that it takes for people to legally enter the United States. He is "100 percent supportive" of expanding the number of individuals allowed to immigrate to the country.
Social issues
Cannabis
LaHood has a "F" rating from NORML for his voting history regarding cannabis-related causes. He opposes the legalization of marijuana, even for medicinal purposes. LaHood opposes veterans having access to medical marijuana if recommended by their Veterans Health Administration doctor and if it is legal for medicinal purposes in their state of residence. He believes the legalization of medical marijuana increases its illegal use and abuse by teenagers and that it is addictive.
Donald Trump
LaHood believes that Trump should release his tax returns and will vote in favor of requiring it if a bill is presented to the House. Regarding Trump's visits to Mar-a-Lago, LaHood believes "more business should be conducted in the White House than in Florida."
Electoral history
Personal life
LaHood lives in Dunlap, a suburb of Peoria, with his wife Kristen; they married in 2000. They have three children: McKay, Lucas, and Teddy.