she can't do anything without congress agreeing.What that whole paragraph is telling you is that she won't allow guns, she supports abortions right up to full term and illegal immigrants will be allowed to vote, but I don't think many people got that message. They hear that she's going to improve their freedom somehow.
On guns, she will try to introduce compulsory background check and liability insurance when you want to buy a new gun. With over 400 million guns in the country, it won't have any immediate effect. Meanwhile, Trump proposes 10 years prison for illegal immigrants. There are about 2 million prison places, 1.5 million cells are already in use. Trump will need to build 3 millions new prison cells every year. Judging by his wall on the Southern border, Trump built 42 miles in his term out of over 1000 miles of border, his new prisons for illegal immigrants won't be built any more than Harris stopping gun violence.