Two main contenders on collision course in US presidential race

Donald Trump rolled up victories in five more states, amassing a north-eastern sweep that gives the Republican front-runner important momentum in his push for the presidential nomination even if his pathway has little room for error.

The New York billionaire scored wins in Pennsylvania, Maryland, Connecticut, Delaware, and Rhode Island — all five states that held Republican primary contests on Tuesday.

It was a dominant performance fuelled by support from nearly all ages and education levels.