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It did not give a reason for the visit or elaborate on his schedule, but Saudi Arabia is hosting an international conference on combating extremism later this week in the capital, Riyadh. The gathering will be co-chaired by U.S. Secretary of State Antony Blinken.

Saudi Arabia has been a close U.S. ally for decades, but . Over the last few months, the kingdom has restored relations with Iran's theocracy and Syria's President Bashar Assad — both seen as pariahs in the West.

Last month, the Saudis . But days later, they hosted .

The Saudis say they are pursuing their own national interests in a world increasingly defined by great power competition. Experts say the diplomatic surge is aimed at shoring up regional stability and improving the kingdom's image as it seeks international investment for massive development projects.

Maduro was re-elected in 2018 after judges banned his main opponents from competing, . Most opposition parties refused to recognize the election results and challenged Maduro’s rule by creating an interim government, a push for change that fizzled out over the past two years.

Washington backed the opposition and imposed heavy sanctions on Maduro’s autocratic government, hoping that would spark change. But Maduro’s government dug in and resisted the sanctions with support from Russia, Turkey and Iran.