Far-right José Antonio Kast favored to win as Chile votes in presidential runoff

Trump-inspired former congressman expected to succeed Gabriel Boric but compulsory voting could create volatility

Chileans will head to the polls on Sunday for a presidential runoff in which the favourite is a Donald Trump-inspired candidate who has pledged to build a wall along the country's borders to keep migrants out.

Jose Antonio Kast, 59, an ultra-conservative former congressman who has built his campaign on a promise to expel tens of thousands of undocumented migrants, faces Jeannette Jara, 51, a former labour minister under the current centre-left president, Gabriel Boric, 39.