Partisan Breakdown by Senate Class

[Talleyrand]

So, after this election, this will be the breakdown of parties by senate class.

Class 1 (2012/2018)- 25 Democrats, 8 Republicans
Class 2 (2014/2020)- 11 Democrats, 22 Republicans
Class 3 (2010/2016)- 10 Democrats, 24 Republicans

Very polarized.

After this election 25/46 Democratic Senators will be from Class 1.

Before this election 24/45 Republican Senators were from Class 3.

Are situations like this fairly normal or are things like this a fairly new phenomenon?

[Skill and Chance]

Well, in the old days, Class 2 would have been very, very Democratic due to the entire South except Florida being up, while Class 1 and 3 would have been slightly Republican leaning on the whole.  Except that a predicted long term Republican edge for senate control didn't really materialize historically due to rural states being more elastic. 

[Miles]

FWIW, Sabato did a diary on this last year.

[Maxwell]

If Hillary is President, 2018 is going to be very rough for the Democrats in terms of Senate seats.

[morgieb]

If Hillary is President, 2018 is going to be very rough for the Democrats in terms of Senate seats.

If her coattails are limited there's a good chance of the Pubs holding a filibuster-proof majority (though given a Democrat's President that's not really relevant).

[Del Tachi]

If Hillary is President, 2018 is going to be very rough for the Democrats in terms of Senate seats.

If her coattails are limited there's a good chance of the Pubs holding a filibuster-proof majority (though given a Democrat's President that's not really relevant).

Forget filibuster-proof majority, if the GOP can minimize losses in 2016 (say, we only lose 2 of IL, PA, WI, NH and other competitive races) then PA, OH, WV, VA, FL, MO, IN, WI, MI, ND, and MT (all competitive states) would give the GOP a veto-proof majority in the Senate.