Washington (AFP) – Secretary of State Antony Blinken will head next week to Colombia and Chile to forge ties with new left-leaning leaders elected in the historic US allies, the State Department announced Friday. The top US diplomat flies Monday to Colombia where he will see President Gustavo Petro, who took office in September as the first leftist to head the country long vital to US strategy in South America. Blinken will then head Wednesday to Chile and see President Gabriel Boric, a 36-year-old left-wing former student leader who took office on a campaign to sweep away the legacy of US-bac…