Go here to make maps:
https://uselectionatlas.org/TOOLS/evcalc.phpClick "Show Map Link", and paste the result in your post.
As for the scenario, my first guess is something like this. I assume that Trump drops early enough to secure ballot access to all states, except perhaps Oklahoma. It'd be a Democratic blowout in both electoral votes and the popular vote.
Clinton/O'Malley - 48% (484 electoral votes)
Trump/Carson - 26% (33 electoral votes)
Bush/Kasich - 19% (21 electoral votes)
Sanders/Warren - 5%
Webb/Johnson - 1%
Others - 1%