President Donald Trump warned on Tuesday that the “nasty horrible’” coronavirus will get worse in the U.S. before it gets better, but he also tried to paint a rosy picture of efforts to conquer the disease that has claimed more than 140,000 American lives in just five months. He also professed a newfound respect for the protective face masks he has seldom worn. He pulled one from his pocket in the White House briefing room but didn’t put it on. After a three-month hiatus from his freewheeling daily virus briefings, Trump returned to the podium, keeping the stage to himself without the public health experts who were staples of his previous events but keeping close to scripted remarks prepared by aides.