By 2050, how many female presidents?

[Del Tachi]

There's really no way to know this, but I think its pretty likely the answer is "none".

Assume Trump defeats Joe Biden in 2020.  Progressives are livid, and the backlash is enough to nominate AOC in 2024 but she fails spectacularly to a male Republican nominee (i.e., Pence, DeSantis, Pompeo, etc.).  Moderate Dems come back in 2028 by nominating Gavin Newsom or Hakeem Jeffries and defeating the Republican incumbent, and the Dem gets a second term in 2032. 

We're now to 2036 without a female president.  Its not hard to see Republicans putting up another White guy who is able to beat the Democratic nominee due to fatigue after Newsom/Jeffries' two terms.  Say the economy is good and he gets reelected in 2040.  Now we're to 2045 with no female POTUS.