The current winner take all electoral system is suicide for the Repubs. With the exception of TX, all the big states are solidly RAT so the Repubs pretty much HAVE to win everything else which is extremely difficult. Unless we go to a proportional electoral system the Repubs may NEVER win another Presidential election.
Under the current system and primarily due to the increasing Latino share of the electorate, the Democrats can get to 270 Electoral votes to claim the presidency by winning just 14 states won by Obama in 2012 plus the District of Columbia: CA (55), NY (29), FL (29), IL (20), PA (20), OH (18), MI (16), NJ (14), VA (13), WA (12), MA (11), MD (10), MN (10), WI (10), DC (3).
Obama also won electors in 12 other states: CO (9), CT (7), OR (7), NV (6),
IA (6), NM (5), ME (4), NH (4), RI (4), HI (3), DE (3), VT (3).