Control of the Senate is coming down to this hidden dynamic

Control of the US Senate will be decided next week in cross-pressured states where most voters disapprove of President Joe Biden’s performance but also express unfavorable views about their state’s Republican Senate nominee.

Public polls show Biden’s job approval rating is consistently below 50%, and often well below that, in all the states most likely to determine the Senate majority – even though they’re almost all states he carried in 2020. Over the past three decades, it has become increasingly rare for Senate candidates on either side to win election in states...