Canada complains that New York is using a legal loophole to send migrants its way, buying them bus tickets to the border

• New York authorities are paying for migrants to take a bus north.
• Once in the north of the state, migrants cross into Canada to claim asylum. 
• Republicans have sent busloads of migrants to New York to score political points. 

An immigration official in Quebec has said it is "surprising" that New York authorities are sending migrants to Canada's border.