By Timothy Gardner WASHINGTON (Reuters) – A U.S. State Department official put pressure on Venezuela leader Nicolas Maduro in a congressional hearing on Thursday, threatening more sanctions if talks with the opposition on resolving the country’s long-running political and economic crisis are not renewed. The talks between Maduro and opposition leader Juan Guaido were last held in Mexico City last year, but yielded little. The Biden administration recognizes Guaido as Venezuela’s legitimate president, having rejected Maduro’s 2018 re-election as a sham. Maduro, a socialist, remains in power in …