Everything has changed in practice, when people are detained at the border because they posted something on social media which was critical of Trump, in a count

Everything has changed in practice, when people are detained at the border because they posted something on social media which was critical of Trump, in a country which prides itself on having "freedom of speech" in the constitution. When denial of entry means weeks in detention rather than an expedient flight back to where you came from. When going to speak at a conference can get you detained for violating a visa which has always been fine for that before. When people with green cards are getting arrested and sent for deportation... everything has changed.