It's about the presidential election and has become a discussion about the whole US government. 3 branches of a republican/democratic type government are the executive, legislative and judicial. Executive (includes the president) has a say in who becomes a member in the others in US and legislative/judicial in US create laws. Laws are sets of rules that govern almost every behavior in a society which includes abortion too, so that discussion popping up was just natural.
Discussing about abortion might very well change your opinion on republicans and change who you vote for.
Sadly the democrats and liberals I associate myself with also have mostly been using emotional statements and cherry picking studies and statistics to justify their positions instead of rational critical thinking and science. On top of that lately the so called neofeminists, SJWs and movements like "Black Lives Matter" are nothing remotely close to a liberal like me, to me they are as bad as religious fundamentalist conservatives and use the same tactics and (lack of) logic, they are simply wearing a different colored shirt than the rights.
This is why even though there are several things I disagree with Trump I think I have to make compromises and he is comparably a better option than the democrats which share very little with me.
I've been looking at Bernie's positions and while I still think he's a better option than Hillary I'm still going to go with Trump. Only the facts that he considers stronger border control racism and the president's constitutional right of temporary ban of a certain group of aliens entering to the states racism and any ciritcism of islamism racism makes me conclude that he has very terrible foreign policy and good domestic policy isn't enough for a president in my book.