21. Sen. Ben Cardin (D) of Maryland
> Popularity: 49% approve; 23% disapprove
> Assumed office: 1/3/2007
> Current term ends: 2025
> Nov. 2018 voter participation in MD: 49.7% (24th lowest)
> 2018 state unemployment: 3.9% (21st highest)
22. Sen. John Boozman (R) of Arkansas
> Popularity: 49% approve; 27% disapprove (tied)
> Assumed office: 1/3/2011
> Current term ends: 2023
> Nov. 2018 voter participation in AR: 40.6% (2nd lowest)
> 2018 state unemployment: 3.7% (24th lowest)
23. Sen. David Perdue (R) of Georgia
> Popularity: 49% approve; 27% disapprove (tied)
> Assumed office: 1/3/2015
> Current term ends: 2021
> Nov. 2018 voter participation in GA: 52.0% (19th highest)
> 2018 state unemployment: 3.9% (21st highest)
24. Sen. Maria Cantwell (D) of Washington
> Popularity: 49% approve; 27% disapprove (tied)
> Assumed office: 1/3/2001
> Current term ends: 2025
> Nov. 2018 voter participation in WA: 56.0% (9th highest)
> 2018 state unemployment: 4.5% (9th highest)
24/7 Wall St.
25. Sen. Mark Warner (D) of Virginia
> Popularity: 49% approve; 30% disapprove
> Assumed office: 1/3/2009
> Current term ends: 2021
> Nov. 2018 voter participation in VA: 52.0% (19th highest)
> 2018 state unemployment: 3% (11th lowest)
26. Sen. Lindsey Graham (R) of South Carolina
> Popularity: 49% approve; 35% disapprove
> Assumed office: 1/3/2003
> Current term ends: 2021
> Nov. 2018 voter participation in SC: 46.9% (10th lowest)
> 2018 state unemployment: 3.4% (20th lowest)
27. Sen. Ted Cruz (R) of Texas
> Popularity: 49% approve; 36% disapprove
> Assumed office: 1/3/2013
> Current term ends: 2025
> Nov. 2018 voter participation in TX: 42.2% (3rd lowest)
> 2018 state unemployment: 3.9% (21st highest)
28. Sen. Jon Tester (D) of Montana
> Popularity: 49% approve; 39% disapprove
> Assumed office: 1/3/2007
> Current term ends: 2025
> Nov. 2018 voter participation in MT: 63.0% (2nd highest)
> 2018 state unemployment: 3.7% (24th lowest)
29. Sen. Elizabeth Warren (D) of Massachusetts
> Popularity: 49% approve; 41% disapprove
> Assumed office: 1/3/2013
> Current term ends: 2025
> Nov. 2018 voter participation in MA: 50.0% (25th lowest)
> 2018 state unemployment: 3.3% (15th lowest)
30. Sen. Ron Wyden (D) of Oregon
> Popularity: 48% approve; 27% disapprove
> Assumed office: 2/5/1996
> Current term ends: 2023
> Nov. 2018 voter participation in OR: 58.2% (6th highest)
> 2018 state unemployment: 4.2% (13th highest)