2018Flipped from RepublicanFinal results
2018 election for Arizona's 2nd District
U.S. House · Arizona
Ann Kirkpatrick (D) won with 54.6% of the vote, defeating Lea Marquez Peterson (R) by 9.5 points, a seat Republicans won last time.
Ann KirkpatrickDemocrat · winner
54.6%161,000
Lea Marquez PetersonRepublican
45.1%133,083
294,840 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Ann KirkpatrickLea Marquez Peterson
$4.6M
Raised by the campaign
$1.5M
$4.5M
Spent by the campaign
$1.5M
$72.2K
Cash on hand
$9.2K
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018