6. vex—rather, "throw into consternation" [Gesenius].
make a breach—rather, "cleave it asunder." Their scheme was to divide a large portion of the territory between themselves, and set up a vassal king of their own over the rest.
son of Tabeal—unknown; a Syrian-sounding name, perhaps favored by a party in Jerusalem (Isa 3:6, 9, 12).