He is indeed not necessarily wrong, but it is not smart to say so.
And if the US doesn't need other countries, why was it the only contry so far to call on article 5 of NATO? Or begging other countries to take Guantanamo Bay people? You need goodwill.

There is little incentive to move to the US from Norway, Sweden, Denmark or the Netherlands period. Not only because of economic reasons. And Haiti, El Salvador and many African countries are in many ways not as nice as the US. However, to call them what the president of the USA calls them, is just ...

Maarssen, The Netherlands; Orange