Answer: New Mexico’s 2nd District seems a good candidate
Since 2016, New Mexico's 2nd District has changed hands in every election. Republican Steve Pearce held the district in 2003-2009 and 2011-2019, leaving in the 2008 and 2018 cycles to mount (unsuccessful) bids for Senate and governor, respectively. When he left in 2008, Democrat Harry Teague won the seat, only to lose to Pearce when he returned.
According to Daily Kos Elections, Biden won the current configuration of the seat by 6 points in 2020, but in 2022 Democrat Gabe Vasquez beat incumbent Republican Yvette Herrell by less than 1 point. The seat is about 60 percent Hispanic, and as we've seen change in the Hispanic vote in the last few years, I expect it to remain competitive in the coming cycles.
—Mary Radcliffe, 538