According to Morning Consult Political Intelligence tracking, Sinema’s approval rating fell from 48 percent to 42 percent among registered voters in Arizona between the first and third quarters of 2021, while the share who disapprove increased from 35 percent to 42 percent during that time.

The decline was largely driven by Democratic voters, who, at 46 percent, are now 21 percentage points less likely to approve of the Arizona senator’s job performance than they were at the beginning of the year. And Sinema, who was recently followed into a bathroom by immigration activists and faces calls for a Democratic challenger if she runs for re-election in three years, can’t count on robust support from the faction still backing her: 14 percent of Arizona Democrats say they “strongly” approve of Sinema, compared to 28 percent who said the same in the Jan. 1-March 31 surveys.