Do you really think DEMs can cover 23 of 25 Senate seats and maybe grab Nevada from the GOP to keep it at 53-47 GOP in 2018?
The GOP will get at least a +8 gain in 2018, filibuster proof.
I'm sure you've looked at the 33 seats up for grabs.
Why do you think trump is keeping Priebus around ?
I haven't yet looked. But am so doing at this time. Okay, at this time I see Democrats in danger in Indiana and Missouri. Perhaps in Montana and North Dakota. The rest of the Democratic seats looks fairly safe to me. Now that is two years off, who knows what Trump will do. All it takes is another ACA to swing six or more seats from Republican to Democratic. Something against the majority of Americans wishes.
McCaskill should have been gone in 2012, only the Republicans nominated Aiken. The Republicans were dumb in Indiana with Mourdock. They can be dumb again. Nevada is trending Democratic, although it is hard to beat an incumbent without some screw up along the way.
Then too the party in power, the one who holds the white house tends to lose seats.
I do not have governors or state legislators, but here is the congressional numbers at the beginning of each president term/s and the last year he left office.
Eisenhower 1952 48 senators, 221 House 1960 34 senators, 153 house
JFK/LBJ 1961 64 senators, 283 House, 1968 64 senators, 248 house
Nixon/Ford 1969 36 senators, 187 House, 1976 37 senators, 144 house
Carter 1977 61 senators, 291 house, 1980 58 senators, 277 house
Reagan 1981 53 senators, 192 house, 1988 45 senators, 177 house
Bush I 1989 45 senators, 175 house, 1992 44 senators, 167 house
Clinton 1993 57 senators, 258 house, 2000 45 senators, 211 house
Bush II 2001 50 senators, 221 house, 2008 49 senators, 198 house
Obama 2009 59 senators, 256 house, present 46 senators, 188 house
Eisenhower lost 14 senators and 68 house seats over his two terms
JFK/LBJ, I included both as JFK was assssinated and this spans two terms, No change in senators, but a net loss of 35 house seats.
Nixon/Ford again I included both as Nixon resigned and Ford replaced him, abet unelected. They actually gained one senate seat, but loss 43 house seats.
Carter lost 3 senate seats and 14 house seats over his one term.
Reagan lost 8 senate seats and 15 house seats.
Bush the First, lost one senate seat and 8 house seats over his one term.
Clinton was one of the bigger losers like IKE, he lost 12 senators and 47 house seats.
Bush the second lost one senate seat and 23 house seat
Obama lost 13 senators and 68 house seats.