A newly appointed U.S. envoy says she hopes Lebanese authorities are committed to making sure that the Hezbollah militant group isn't a part of the new government in any form.

Hezbollah, a powerful Iran-backed militia, has long been the country’s dominant political force and has formed part of the government for decades.

President Donald Trump's envoy is set to deliver a firm message to Lebanese leaders during a visit on Thursday: the U.S. will not tolerate the unchecked influence of Hezbollah and its allies over the formation of a new government.