Karoline Leavitt, the youngest person to serve as White House press secretary, will make her debut in the briefing room on Tuesday. The James S. Brady Press Briefing Room was the site of clashes between spokespeople and journalists during President Donald Trump’s first term. Trump, a Republican, also made frequent appearances there himself during the coronavirus outbreak. It’s unclear how often Leavitt, 27, plans to hold briefings. Trump had…