Trump was horrendous, just about anyone else would be better. Meghan is sly, manipulative, determined, spoilt, likes women. Already a better option :-)
Meghan Markle runs for President and wins. Disaster strikes the Royal Family as William, Kate, and their children all sadly disappear and therefore can't be declared King or Queen. Harry becomes heir and then King. The US and UK finally reunite after 230 years.
Just a pipe dream. The Republicans will not choose Trump and the Democrats would not choose a two-bit actress with absolutely no experience of politics or diplomacy.
//But since she cannot be relied upon to keep private family conversations confidential I doubt the Spooks would allow her access to any sensitive information.//
Trump leaked lots of sensitive intellgience including exposing intelligence assets