Right now businesse's are leaving California & New Jersey by wagon trains. These two states have the highest state tax rates in the country--while also showing the highest budget deficits. IOW-the more they tax the more they spend. They have been run by democrats for decades--regardless of one single Republican governor--their state legislatures have been all democrat big spending majorities.
It hasn't been "one single Republican governor". Both New Jersey and California have only recently shifted to the Democratic column.
From 1968 to 1988, the Republicans won New Jersey in every presidential election and it was one of the closest state in 1992. The Republicans have held the New Jersey governorship for most of the last quarter-century (14 years).
California had been even more strongly Republican. From 1952 to 1988, the Republican presidential candidate carried California in every election except 1966. The state has also favored Republicans for the governor's mansion. In the last 25 years, the Republicans have held the governorship for 21 for them.