The contests are close in Arizona, Georgia, Nevada and Pennsylvania. Many voters want Republicans to flip the Senate, but prefer the Democrat in their state.
The attack on the husband of Speaker Nancy Pelosi, which appeared to target her, came after more than a decade of Republican efforts to demonize and dehumanize the most powerful woman in Washington.
Deep-red Oklahoma is in play for Democrats. New York and Oregon are within reach for Republicans. And several swing states have tight races with high stakes on abortion, elections and other issues.
On a wide array of issues like abortion, taxes, race and judges, President Biden’s opportunities would shrink as Republicans vow to dismantle much of his legislative accomplishments.
Polls show Representative Tim Ryan competing within the margin of error against his Republican opponent, J.D. Vance, in the high-profile Ohio Senate race.