《纽约时报》分析了2026年143场众议院和参议院单一党派初选，这些初选至少有一名现任议员和一名获得至少10%选票的挑战者。（《纽约时报》认为获得不到10%选票的人不是认真的竞争者。
The Times analyzed 143 House and Senate single-party primary races in 2026 that featured at least one incumbent and a challenger who garnered at least 10 percent of the vote. (The Times considered those who garnered less than 10 percent of the vote to be less serious contenders.)
）《纽约时报》排除了阿拉斯加、加利福尼亚和华盛顿州的初选，因为这些初选有来自多个党派的候选人。
The Times excluded primaries in Alaska, California and Washington because they featured candidates from multiple parties.
由于重新划分选区，两名现任议员角逐德克萨斯州第18选区的民主党初选。
Due to redistricting, two incumbents vied for the Democratic primary in Texas’s 18th District.
为便于分析，《纽约时报》将在国会任职超过20年的Al Green视为现任议员，将刚在特别选举中赢得该席位的Christian Menefee视为挑战者。
For the purposes of this analysis, The Times considered Al Green, who had served in Congress for more than 20 years, to be the incumbent and Christian Menefee, who had just won a special election to the seat, to be the challenger.
图表显示候选人在初选当天（或现任议员进入决选时的决选日）的年龄，《纽约时报》根据选民名册和其他公开记录确定这些年龄。《纽约时报》使用了皮尤研究中心的代际定义。
Charts show candidates’ ages on the day of their primaries (or runoffs in cases where incumbents advanced to that stage), which The Times determined from voter rolls and other public records. The Times used generation definitions from the Pew Research Center.
为识别提及年龄的政治广告，《纽约时报》审查了2025年1月至2026年9月中旬播出的视频，使用媒体追踪公司AdImpact收集的数据。
To identify political ads that referred to age, The Times reviewed videos that aired between January 2025 and mid-September 2026, using data gathered by AdImpact, a media tracking firm.
《纽约时报》使用AI模型和关键词搜索标记潜在相关广告，然后逐一核实每个匹配项。
The Times used an A.I. model and keyword searches to flag potentially relevant ads and then checked each match individually.