Hillary's path to victory is to hold the states she won in 2008 and add on the Southern (heavily African American) states Obama won, leaving Sanders with some (mostly smaller) states in New England, the Midwest and the Northwest.
And so far that plan seems to be working. She started off trading IA (which Obama won) for NH (which he lost). She won NV again, then picked up SC.
On Super Tues she re-won TX, AR, TN and MA. Lost (again) in CO, MN and VT, and picked up Obama 2008 Southern states of AL, GA, VA. The only place where things have gone off from the plan was OK (which she won in 2008).
But as long as she continues to hold most of her 2008 states and win half of Obama's, she can't lose.
At this point, it's fairly clear that Clinton will win the Democratic party nomination. The real question is how strong a candidate will she be going forward? And on the GOP side, how strong a candidate will Clinton be running against? If the presumptive outcome takes place, and this becomes a Clinton vs. Trump battle, I think we'll all end up looking back at the many indicators which now show Clinton to be a much weaker candidate than many would have hoped for...
