Three of the five toss-up Senate seats have been Democrat recently

Forecast

Incumbent

President

Senate

Cook Political,

23 Sept

2008

2012

2016

2002

2008

2014

+17

+3

+15

Maine

Susan Collins

Toss-up

+17

+23

+36

+9

+0.3

North Carolina

Thom Tillis

Toss-up

+2

+2

+4

+9

+25

+10

+10

+6

Iowa

Joni Ernst

Toss-up

+8

+9

Georgia

David Perdue

Toss-up

+5

+5

+7

+7

+8

+8

+46

+31

Montana

Steve Daines

Toss-up

+14

+2

+18

+20

President

Senate

08

12

16

02

08

14

Maine

Incumbent:

Susan Collins

+3

+17

+15

+17

+23

+36

+9

North Carolina

Thom Tillis

+0.3

+2

+2

+4

+9

+25

+10

+10

+6

Iowa

Joni Ernst

+8

+9

Georgia

David Perdue

+5

+5

+7

+7

+8

+8

+46

Montana

Steve Daines

+31

+14

+18

+2

+20