Donald Trump dominates the new Monmouth national poll of the Republican presidential race — in every category except one.

Trump leads the horse race, with 30 percent, to Ben Carson’s 18 percent, with Jeb Bush and Ted Cruz tied for third at 8 percent. (Marco Rubio is next at 5 percent, Carly Fiorina at 4 percent, and Scott Walker is at 3 percent.) Trump leads among various subgroups sorted by ideology, policy preference, and age. And he leads in head-to-head matchups with other Republican candidates.