Trump targets older voters with an ad focusing on Social Security and Medicare.

Unlike many of Mr. Trump’s earlier ads that were purely attacks against Mr. Biden, this ad spends its final third proclaiming that Mr. Trump “is protecting Social Security and Medicare” while headlines from Trump-friendly publications like The New York Post flash across the screen.

Fact Check

During his 36-year Senate career, Mr. Biden supported some actions that would slow or reduce spending on Social Security but also supported others that would protect benefits.

In 1984, he co-sponsored an amendment with two Republican senators that froze for one year nearly all military and domestic spending, including cost-of-living adjustments to Social Security benefits. In 1996, he supported raising the retirement age.

But Mr. Biden’s current plan calls for putting more resources behind both programs while increasing benefits, paid for by higher taxes on the wealthy.

Mr. Biden has also not called for taking away Social Security or Medicare from American citizens to provide it for undocumented immigrants.