Obama Did Things Secretly While Donald Trump Talks About Important His Actions.
According to the US visa policies, From several years, It was not easy to get US visas from Islamic Countries and especially from the banned 7 countries. People coming from other muslim countries were asked by Immigration if they had travelled to banned countries like Iran, Iraq, Somalia, Libya, Syria and Sudan. It was also asked in Visa Application Forms.
The Mistake Made By Trump Is He Has Issued Executive Order About something which was already existing and practiced.