American presidents/power structures come from a small credentialed network of people. The congress is entirely bought and paid for since the early 70s, and the will of the people isn't represented in the policy. For sure the US (and China, and India) have a "checkered past", that's why I group them together and don't really differentiate the quality of their democracy. I'd argue India is probably the most democratic country with good results, simply based on the amount of people they have lifted out of poverty in the last two decades (Kishore Mahbubani's lectures are quite informative).
Back to US presidents/power structures: HW Bush was the son of Sen. Prescott Bush, and became president 8yrs after he left office. His other son Jeb was the 2016 establishment favorite and Florida governor. Al Gore was the son of Senator Albert Gore Sr. Mitt Romney was the son of George Romney (Michigan governor and 1968 presidential candidate). Dan Quayle's family owned the Indiana newspaper chain that helped make him. Hillary was Bill's wife before she was a senator, Secretary of State, and nominee. John McCain was the son and grandson of four-star admirals.
Biden and Obama were 2008 primary rivals, Biden became his VP. Harris went from attacking Biden over school busing and became his VP. Hillary Clinton had many racist attacks against Obama through 2008 and became his Secretary of State. John Kerry, who lost in 2004 then took the same job.
If this is a healthy democracy, then we definitely have different definitions of that word.