CBS News Biden-Trump poll finds concerns about Biden finishing a second term, and voters' finances also weigh on Biden

The summer before an election year is not always kind to first-term Democrats. 

In August of 1995 Bob Dole led Bill Clinton. In the summer of 2011, the public's "grim views" of the economy, we said at the time, pushed Barack Obama's disapproval to its then-highest point. 

That both presidents recovered and went on to reelection may give Democrats hope, because right now Joe Biden and the Democratic Party face major challenges of their own.