Democrats are defending a slim Senate majority. Here's a look at the states where both parties are fighting for control.

• The 2024 Senate elections — which will run concurrent with the presidential race — are approaching.
• Democrats will have to defend several vulnerable incumbents in swing and GOP-heavy states.
• However, the party has held its own in the last three cycles in navigating tough Senate races.

In the 2022 midterm elections, Democrats defied political expectations by holding on to their Senate majority. Every incumbent secured reelection, and then-Pennsylvania Lt. Gov. John Fetterman flipped the seat vacated by retiring Republican Sen. Pat Toomey.