Romney got 44% of the women's vote compared to Obama's 55%. Women made up 53% of the electorate in 2012. Romney won the white women's vote 56% to 42%. White women made up 38% of the electorate.
Race and ethnicity play more of a factor in how women vote rather than gender. And so does marital status. Romney won the married women's vote 53% to 46%. Obama won single women 67% to 31%. Of course, minorities like blacks and Hispanics don't marry and single family parents are the rule. 73% of black children are born out of wedlock.
The changing demographics of the country fueled by mass immigration and high minority birthrates will make the Dems the permanent majority party within a decade.
The slow rate of change of things like Congressional District boundaries, combined with the ability of legislatures to gerrymander, means that at the local and state level the effects of the Great Replacement can be held off for a bit.
But at the national level I don't even see 10 years. If Trump loses (or maybe even if he wins) it's the end for the GOP and Conservatives being in the White House.
The Dems may eventually be putting both candidates up: one from the Hillary wing, one from the Bernie wing. The GOP will re-brand itself in a way that will shock and appall most current supporters. We will look back fondly on psedo-conservatives like Romney when we see what the GOP is running to win in 2024 and 2028.