Trump wins latest poll as Bush throws in the towel

As field narrows, Clinton secures crucial victory over Sanders in Nevada's Democratic caucuses

Donald Trump widened his lead over the Republican party's presidential field claiming a big victory on Saturday as the contest moved into the South. Out West, Hillary Clinton beat Vermont Senator Bernie Sanders for a crucial win in Nevada's Democratic caucuses.

Former Florida Governor Jeb Bush, who had done poorly in the first three early Republican contests, suspended his campaign after a disappointing fourth place finish in South Carolina.