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

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.

Morgan Ortagus is heading a delegation and set to arrive in Lebanon on Thursday night, the first such visit by Trump administration officials.