In the average state, 44 percent of suburban voters approved of Biden’s job performance in the third quarter of his presidency, down 6 percentage points since his first three months in office, while the share who disapproved increased 8 points to 52 percent. Taken together, this marks a 14-point decline in Biden’s net approval rating in the suburbs that helped deliver Democratic victories over the past four years, from Virginia’s governorship in 2017 to the two Senate runoffs in Georgia early this year.

Some of the largest drops in Biden’s suburban support came in Georgia, as well as Wisconsin, North Carolina, Ohio, Michigan, Florida and Pennsylvania — all of which feature prominently in the pending races to control the Senate or House…

Among all voters, more approve than disapprove of Biden’s job performance in 18 states — mostly Democrat-friendly places such as California, Illinois, Minnesota and New York, as well as Virginia, all of which are likely to host competitive House contests. Biden’s net approval rating is underwater in 32 states, including narrow deficits in Nevada and Georgia and larger gaps in Florida, Pennsylvania, North Carolina and Ohio — which will all host decisive Senate races.