Incumbent Susie Lee holds a commanding position in Nevada’s 3rd congressional district heading into the November 3 general election, reflected in trader consensus at 94.5% implied probability. She secured her Democratic nomination with 69% of the primary vote and maintains strong fundraising alongside an established record in the Las Vegas-area seat. The district, last won by a Republican in 2014, carries a lean Democratic rating from major forecasters despite a narrow 2024 Trump margin. Challenger Marty O’Donnell, who prevailed in the Republican primary, faces structural headwinds in a battleground that has favored the Democratic incumbent in recent cycles. Late developments such as turnout shifts in key Las Vegas precincts or national political momentum could still narrow the gap before ballots are cast.