I suppose it depends on who is the Democrat nominee. Some of them are pretty horrendous. I would certainly fear for the future of the USA if either Trump or Clinton were to get into the White House.
Three Democrat candidates - Clinton, Bernie Sanders and Martin O'Malley - at the moment, with a few other (even) less known names on the fringes, though it seems unlikely they'll have a run this late.
Of the three, none are of the calibre of Obama as far as their prestige on the international stage. Sanders appears too left wing to win the actual election, which I think will lead most Democrat voters to hedge their bets and nominate Clinton - whilst she's far from perfect, she's a hell of a site better than Trump, Carson or indeed any of the other Republican candidates.
In terms of international economics and politics any of the Democrat candidates are a vast improvement on the Republicans, especially with the Republican control of the Senate and the lower House.
O.
O.