Marjorie Taylor Greene - a staunch ally of Donald Trump - defended the president's controversial tariffs and dismissed challenges from the audience during a tense town hall event in Georgia.

Minutes later, as Ms. Greene started to play a video of former President Barack Obama discussing the national debt, police forcibly removed and used a stun gun on a second man, identified later as Johnny Keith Williams of Dallas, Ga., who had stood up and started to heckle.