The Senate’s top Democratic obstructionists all have one thing in common: They are planning to run for President in 2020.

Axios compiled a list over the weekend of the ten Democratic senators who have voted against President Trump’s nominees most often, and the top six are all possible 2020 candidates. Ranked by the frequency of their votes against Trump’s nominees, Sens. Kirsten Gillibrand, D-N.Y., and Elizabeth Warren, D-Mass., take the first two slots, coming in at 94.6 percent and 91.9 percent respectively. They’re followed by Jeff Merkley, D-Ore., (86.5 percent), Bernie Sanders, I-Vt. (86.1 percent), Cory Booker, D-N.J., (85.7 percent), and Kamala Harris, D-Calif., (83.8 percent). Each of those six senators has attracted speculation they’ll run in the Democratic Party’s presidential primary in 2020.