Nationalist and populist and efficient... the exact combination for most of the worst leaders of the 20th Century.
And the best
Why assume that anyone who is popular will lead in a bad direction?
Reagan did not
Thatcher did not
Golds Meir did not
Eisenhower did not
Others did
Fact is in this country the most popular person will win the election ( barring massive rigging and fraud)
You may have to choose between trump/rubio or sanders/ Warren
Either popular