Has anybody else noticed that basically every senator's approval rating is falling?

Senate Guru has a good illustration of SurveyUSA's recent approval ratings for 10 senators up for reelection in 2010.

Almost without exception, and without regard to party, all of them are headed downhill - from Sen. Charles GrassleyCharles (Chuck) Ernest GrassleyGrassley blasts Democrats over unwillingness to probe Clinton GOP and Dems bitterly divided by immigration Thanks to the farm lobby, the US is stuck with a broken ethanol policy MORE's (R-Iowa) 12-point approval drop to Sen. Ron WydenRonald (Ron) Lee WydenDemocratic senator predicts Franken will resign Thursday Avalanche of Democratic senators say Franken should resign Lobbying world MORE's (D-Ore.) six-point drop. Some are dropping faster than others, but each of them has lost approval points or gained disapproval points, and almost all have done both.

The numbers for Sen. Kirsten GillibrandKirsten Elizabeth GillibrandDemocrats turn on Al Franken Report: Franken will resign Thursday Minnesota's largest newspaper calls on Franken to resign MORE (D-N.Y.) - 36 percent approval and 39 percent disapproval - mirror her drop in a Marist Poll released Monday.

Sen. Jim Bunning's (R-Kan.) approval has also dropped, according to other pollsters.

And appointed Sen. Michael BennetMichael Farrand BennetAvalanche of Democratic senators say Franken should resign GOP and Dems bitterly divided by immigration Schumer downplays shutdown chances over DACA fight MORE (R-Colo.) recently displayed some poor approval numbers of his own in a recent Public Policy Polling survey, despite the fact that many Colorado voters barely know him.

And this comes as Americans are supposedly starting to believe in Congress again?

-Aaron Blake