[vanattab]

You might want to look up which party was more supportive of the 19th amendment and check which party supported ending slavery.

"On May 21, 1919, the amendment passed the House 304 to 89, with 42 votes more than was necessary. On June 4, 1919, it was brought before the Senate and, after Southern Democrats abandoned a filibuster, 36 Republican Senators were joined by 20 Democrats to pass the amendment with 56 yeas, 25 nays, and 14 not voting."

[rabbitXIII]

I don't think they mentioned a party anywhere in the parent comment. They were simply talking about the conservative vs progressive side of a debate or policy change

[vanattab]

Around the same time as the 19th amendment was passed. Eugenics was a very "progressive idea"

[yarabarla]

While not a one to one match with current politics, the parties largely swapped demographics and southern Republicans today would have been Democrats at that time.

See: https://en.wikipedia.org/wiki/Southern_strategy