U.S. President Donald Trump's national security adviser, John Bolton, called for the immediate release of Marrero and warned that "Maduro has made another big mistake," adding that the arrest "will not go unanswered." Guaido invoked the constitution in January to assume the interim presidency after declaring Maduro's 2018 re-election a fraud. Maduro, who has overseen a dramatic collapse of the OPEC nation's economy, has called Guaido a puppet of the United States and said he should "face justice," but has not explicitly called for his arrest. Top U.S. officials have repeatedly warned Maduro not to touch Guaido and his inner circle, but it is unclear what more they can do.