Editing St. Charles County, Missouri (section)

===Federal politics===
St. Charles County has long been a Republican stronghold despite being an urban county, likely due to being the wealthiest county in Missouri. 

Despite this, it did vote for [[2020 Missouri Amendment 2|Medicaid expansion in 2020]], [[2022 Missouri Amendment 3|legal recreational marijuana in 2022]], and [[2024 Missouri Amendment 3|legal abortion in 2024]]. It was also one of the few counties in Missouri to shift towards the Democrats from 2020 to 2024.

====2016 Missouri presidential primary results====
'''Republican'''

[[Donald Trump]] won the most votes in St. Charles County, with 41.50 percent. U.S. Senator [[Ted Cruz]] (R-[[Texas]]) came in second with 38.87 percent, Governor [[John Kasich]] (R-[[Ohio]]) placed third with 10.70 percent, and U.S. Senator [[Marco Rubio]] (R-[[Florida]]) was fourth with 7.10 percent.

'''Democratic'''

U.S. Senator [[Bernie Sanders]] (I-[[Vermont]]) won the primary with 54.32 percent to former [[United States Secretary of State|Secretary of State]] [[Hillary Clinton]]'s 44.80 percent.

====2012 Missouri presidential primary results====
'''Republican'''

Former U.S. Senator [[Rick Santorum]] (R-[[Pennsylvania]]) won the most votes in St. Charles County, with 56.29 percent. Former Governor [[Mitt Romney]] (R-[[Massachusetts]]) came in second with 25.43 percent, and former U.S. Representative [[Ron Paul]] (R-[[Texas]]) was third with 12.69 percent.

'''Democratic'''

With incumbent President [[Barack Obama]] facing no serious opposition, few St. Charles County voters voted in the Democratic primary; Obama won 87.83 percent.

====2008 Missouri presidential primary results====
{{main|2008 Missouri Republican presidential primary}}
'''Republican'''

Former Governor [[Mitt Romney]] (R-[[Massachusetts]]) won the most votes in St. Charles County, with 37.72 percent. U.S. Senator [[John McCain]] (R-[[Arizona]]) came in second with 34.95 percent, former Governor [[Mike Huckabee]] (R-[[Arkansas]]) placed third with 21.83 percent, and U.S. Representative [[Ron Paul]] (R-[[Texas]]) was fourth with 3.83 percent.
{{main|2008 Missouri Democratic presidential primary}}
'''Democratic'''

Former U.S. Senator [[Hillary Clinton]] (D-[[New York (state)|New York]]) received a total of 23,611 votes, more than any candidate from either party in St. Charles County during the 2008 presidential primary.