Wow, you're really a loon if you think that's a winning strategy: have Hillary pick a Republican running mate? That might pick up some R voters who don't like Trump, but it'll also cause tons of D voters (including everyone who considers themselves a progressive) to sit out the race or vote third-party. This strategy actually would have been great for getting the Green Party a lot more votes than they got with her crappy pick of Kaine.
Sanders *was* a qualified Democrat. He ran as one, and that's all you have to do. But I guess I shouldn't be surprised that the Democrat Party faithful think that only long-time Party members should be allowed to play in their party. No wonder they have such a hard time getting progressives to turn out to vote for them, by pushing partisan politics over ideals and doing the right thing. Honestly, if there's any good to come out of this crazy election, it'll be the utter destruction of the Democratic Party. At least the Republicans are somewhat honest about their intentions and who they work for.
And Trump absolutely *is* unpopular. Countless polls have proven this. Just because people voted for him doesn't mean they actually liked him, same as Hillary.