Democrats' Senate hopes only get tougher in 2024

If Democrats can hold on to slim leads in Arizona, Georgia, and Pennsylvania this November, they will barely maintain their current 50-50 control of the Senate (all thanks to Vice President Kamala Harris’s tiebreaking 51st vote).

But looking ahead to 2024, the odds of the Democrats keeping the Senate look even slimmer.

Heading into 2022, Democrats had to defend a lot of seats, but mostly on friendly ground. Of the 14 seats the Democrats had to defend, only one (Georgia) was in a state carried by President Donald Trump in 2020. Arizona hasn’t gone Republican since 2014,...