Roll Call’s elections analyst Nathan L. Gonzales gives his 16-months-out take on the landscape for the 2018 Senate races. Historically, senators from the same party as the president lose seats at the mid-terms. This means Sens. Dean Heller, R-Nev., and Jeff Flake, R-Ariz., should be top targets for the Democrats, according to Gonzales. Watch for more analysis on what’s ahead for the Senate races this cycle.