Roe v. Wade - safe, SCOTUS does not overturn past decisions lightly and it will require decades of small rulings chipping away at it first. Most of the anti abortion work has been done at the state level and has been undone by federal courts.
Gay Marriage - safe, Trump doesn't really care at all and is smart enough to know enough Americans support it
Obamacare - who knows, something is gonna happen
immigration - DACA (dream act for kids who came as refugees) repealed as it was done by executive order by Obama. The full effects are really hard to untangle.
Muslims - all bullshit talk, he can't really do much except tell the FBI/DHS/TSA/etc to screen anyone brown a little bit more, deny more visas to citizens from Muslim countries
Trade agreements - who knows. TPP dead, NAFTA unchanged, Brexit means new agreements with England over 10 years. China, big question mark
Wall to mexico - never was gonna happen, more money spent on border patrol and possibly tarriffs/trade war with Mexico is real though
Affirmative action - there isn't that much at the federal level anyways, maybe less at the outsourcing level but most of this was rigged anyways - big companies were subcontracting jobs to minority companies to win bids and keeping most of the money
Social Security, medicaid - untouched
Federal Budget - who knows?