民调：拜登支持率跌幅超过二战以来历任美总统，美媒怎么看​？

According to Gallup, former U.S. President Barack Obama's approval rate averaged 63 percent in the first quarter but dropped to 52.9 percent in the third quarter, which was also a substantial decline.

By contrast, George H.W. Bush and George W. Bush both enjoyed heightened public support between their first and third quarters.

While the causes of Biden's decline are numerous, perhaps the biggest one is that Americans believe there are big economic problems and that Biden isn't focused nearly enough on them.

Not only do Americans believe the nation is on the wrong track, they say the country is worse off than it was a year ago, when Mr. Trump was still president.