


In the 2024 House race for MD-1, Andy Harris (R) won with 59.4% of the vote, defeating Blane H. Miller III (D) who received 37.4%. 2 additional candidates split the remaining vote. Andy Harris's 22.0-point advantage over the runner-up confirmed a comfortable win.
As the incumbent, Andy Harris benefited from name recognition, established constituent services, and the roughly 2-3 point advantage that sitting members typically enjoy. The 2024 presidential election drove higher voter turnout, which can help or hurt down-ballot candidates depending on the top of the ticket.
In the 2022 House race for MD-1, Andy Harris (R) won with 54.4% of the vote, defeating Heather R. Mizeur (D) who received 43.1%. 2 additional candidates split the remaining vote. Andy Harris's 11.3-point lead over the runner-up showed solid but not overwhelming support.
As the incumbent, Andy Harris benefited from name recognition, established constituent services, and the roughly 2-3 point advantage that sitting members typically enjoy. As a Republican, Andy Harris benefited from the historical midterm penalty against the president's party — with a Democrat in the White House, the opposition typically gains seats.
In the 2020 House race for MD-1, Andy Harris (R) won with 63.4% of the vote, defeating Mia D. Mason (D) who received 36.4%. A third candidate also appeared on the ballot. Andy Harris's 27.1-point advantage over the runner-up confirmed a comfortable win.
This was an open-seat race. Open seats typically attract stronger candidates and heavier spending from both parties. The 2020 presidential election drove higher voter turnout, which can help or hurt down-ballot candidates depending on the top of the ticket. The wide margin suggests this district is firmly in the Republican column for the foreseeable future.
In the 2018 House race for MD-01, Andy Harris (R) won with 63.1% of the vote, defeating Jesse Colvin (D) who received 34.8%. A third candidate also appeared on the ballot. Andy Harris's 28.3-point advantage over the runner-up confirmed a comfortable win.
As the incumbent, Andy Harris benefited from name recognition, established constituent services, and the roughly 2-3 point advantage that sitting members typically enjoy. As a Republican, Andy Harris won despite the historical midterm penalty against the president's party (Republican Trump was in office).
In the 2016 House race for MD-01, Andy Harris (R) won with 67.0% of the vote, defeating Joe Werner (D) who received 28.6%. A third candidate also appeared on the ballot. Andy Harris's 38.4-point advantage over the runner-up confirmed a comfortable win.
As the incumbent, Andy Harris benefited from name recognition, established constituent services, and the roughly 2-3 point advantage that sitting members typically enjoy. The 2016 presidential election drove higher voter turnout, which can help or hurt down-ballot candidates depending on the top of the ticket.
In the 2014 House race for MD-01, Andy Harris (R) defeated Bill Tilghman (D) 70.4% to 29.5%. Andy Harris received 176,342 votes compared to 73,843 for Bill Tilghman, a dominant 40.9-point margin reflecting a safely partisan district.
As the incumbent, Andy Harris benefited from name recognition, established constituent services, and the roughly 2-3 point advantage that sitting members typically enjoy. As a Republican, Andy Harris benefited from the historical midterm penalty against the president's party — with a Democrat in the White House, the opposition typically gains seats.
In the 2012 House race for MD-01, Andy Harris (R) won with 63.4% of the vote, defeating Wendy Rosen (D) who received 27.5%. A third candidate also appeared on the ballot. Andy Harris's 35.9-point advantage over the runner-up confirmed a comfortable win.
This was an open-seat race. Open seats typically attract stronger candidates and heavier spending from both parties. The 2012 presidential election drove higher voter turnout, which can help or hurt down-ballot candidates depending on the top of the ticket.