Brazil uses ‘principle of reciprocity’ to block Trump’s advisor; understand what it is and how it was used

“Assuming that all countries are sovereign States, each of them has the authority to determine their rules regarding the entry of people into their territories – without there being a preponderance of one over the other, that is, there is legal equality between the States”, says André Araújo, professor of the Postgraduate Course in Politics and International Relations at FESPSP.