The USA certainly is much different now than 1980 with Reagan, now, California is deep blue, Nevada and Colorado and Virginia, blue, some red states now close to becoming blue like North Carolina, Trump winning states that are often blue in Presidential elections at least like Wisconsin and Pennsylvania. I totally agree, the GOP's chances have declined greatly.
Should we win in 2020, in 2024, Haley has a lot of popularity, not saying I'm a big fan of hers. I do think she has a path though.GOP is really up against it. No way, should Obama have won two terms. Bush in 2000 and Trump in 2016 did not win the popular vote, so that means the Dems have won the popular vote in:
1992
1996
2000
2008
2012
2016