If we end up with a 50-50 US Senate- Democrats can gain another additional seat before 2020.

[nkpolitics1212]

AK- Murkowski-R or Sullivan-R resigns. Begich-D appoints replacement.
CO- Gardner-R resigns. Polis-D appoints replacement.
FL- Rubio-R resigns. Gillum-D appoints replacement.
GA- Isakson-R or Perdue-R resigns. Abrams-D appoints replacement.
IA- Grassley-R or Ernst-R resigns. Hubbell-D appoints replacement.
KS- Roberts-R or Moran-R resigns. Kelly-D appoints replacement.
LA- Cassidy-R or Kennedy-R resigns. Bel Edwards-D appoints replacement.
ME- Collins-R resigns. Mills-D appoints replacement.
MT- Daines-R resigns. Bullock-D appoints replacement.
NC- Burr-R or Tillis-R resigns. Cooper-D appoints replacement.
OH- Portman-R resigns. Cordray-D appoints replacement.
OK- Inhofe-R or Lankford-R resigns. Edmondson-D appoints replacement.
PA- Toomey-R resigns. Wolf-D appoints replacement.
SD- Thune-R or Rounds-R resigns. Sutton-D appoints replacement.
WI- Johnson-R resigns. Evers-D appoints replacement.

Democratic US Senators from States with Republican Governor's.
AL- Jones-D
IN- Donnelly-D
MD- Cardin-D/Van Hollen-D
MA- Warren-D/Markey-D
MO- McCaskill-D
NH- Shaheen-D/Hassan-D
WV- Manchin-D

[Funtatlaguy]

1. At 50-50, Schumer should approach Murkowski to temp caucus with Dems.

She might buy the argument of Senate oversight on Trump until Mueller report comes out.
After that, she can go back to caucusing with the gop.