President Donald talked up the possibility of a coronavirus vaccine by the end of the year on Monday as he looked to show voters in the battleground state of North Carolina that he is responding to the pandemic.Trump, whose job approval ratings have dropped as many Americans believe he has handled the virus badly, sought for the second week to look in command after setting aside his hands-off approach. “I trust all Americans to do the right thing but we strongly advise everyone to especially, especially focus on maintaining a social distance, maintain a rigorous hygiene, avoid crowded gatherings and indoor bars and wear masks when appropriate,” Trump said. The Republican president spoke during a visit to a Fujifilm plant in Morrisville, North Carolina, where work on a vaccine is being performed. During a tour of the facility, he wore a mask publicly for a second time, the first being on a trip to Walter Reed Medical Center near Washington earlier this month.