It’s a free country. So Donald Jr. can do whatever he wants. But please, no. Political dynasties usually don’t work out well for the country.
Examples: The Kennedys, the Bushes, the Clintons.
But on the other hand, I guess John Quincy Adams was OK.
Yes, but in these cases, there weren't particularly big shoes to fill.
Agree - if I wanted a monarchy, I'd move to the UK. However, if we do get a Trump political dynasty, at least it's likely to be Donald Junior rather than his uber-feminist liberal sister Ivanka.