HONG KONG—Two dozen democratically-elected politicians swore loyalty to Hong Kong on Friday under a new patriotic law, but some opposition councillors may face disqualification if their oaths are judged insincere. The communist authorities enacted a law earlier this year that tightened patriotic loyalty tests by forcing all civil servants to take an oath of allegiance to Hong Kong and its mini-constitution, the Basic Law. Under a drive to place “patriots” at the helm of Hong Kong’s institutions, authorities have previously disqualified opposition lawmakers and candidates in elections when similar oaths were deemed insincere, citing media statements or campaign speeches they said had a “tendency” to undermine the overall interests in Hong Kong. Secretary for Home Affairs Caspar Tsui told reporters the government will issue a statement later on Friday on how many of the politicians who had taken the oath passed the loyalty test. Of the 24 politicians elected in …