evidence: Former President Donald Trump continued to attack Nikki Haley’s position on Social Security in the run-up to New Hampshire’s presidential primary last week. "Americans were promised a secure retirement. Nikki Haley’s plan ends that," a narrator says in a Trump campaign ad. "Haley’s plan cuts Social Security benefits for 82% of Americans." The 30-second spot features older people and a clip of Haley, Trump’s former U.N. ambassador, responding to a question about how she would address entitlement programs. "We say the rules have changed," Haley says in the ad. "We change retirement age to reflect life expectancy. What we do know is 65 is way too low, and we need to increase that." [...] Haley’s proposal ties the increased age requirement to gains in average U.S. life expectancy, which ticked up in 2022 after two years of decreases. (Not everyone is expected to live longer, though — research shows that life expectancy is shorter for people with lower socioeconomic status — so raising the retirement age based on that metric would reduce the years they’d receive Social Security benefits.)