All we've been hearing about for weeks is the growing number of embattled Republicans around the country. Are there no Democrats in jeopardy? When is the last time, anyway, that one of the two parties has held all of its seats and picked up many of its rival's?

Ken Rudin at NPR has the answer: Not since 1948 have the Democrats kept all their seats and picked up Republican ones (76 that year)–not even in wave election years like 1974. The Democrats most in jeopardy remain Melissa Bean from Illinois and then a duo in Georgia: Jim Marshall and John Barrow.