What would 2020 look like if Hillary was renominated?

[Mr. Morden]

I saw this saying Trump would beat Clinton by 43-40 in the popular vote if "Election 2016" was re-held.

Not only would Trump win the popular vote by +3 instead of losing by -2 but non-Trump/Hillary vote shares would increase from 5.7% to 17%

If the remaining 17% was distributed accordingly (considering that Johnson, Stein and McMullin ran again):
Johnson: 10%
Stein: 6%
McMullin: 2%
Write-Ins/Other: 1%

What would electoral map look like, what would be the close states in a rematch?

Those aren't the right 3rd party #s.  Here is the poll:

http://www.langerresearch.com/wp-content/uploads/1186a1Trump100Days.pdf

and it has:

Trump 43%
Clinton 40%
Johnson 5%
Stein 3%

Note that that's among people who claim to have voted in 2016.  Among all adults, the results are quite different:

Clinton 41%
Trump 37%
Johnson 5%
Stein 3%