U.S. President Donald Trump said Friday that he will return to the campaign trail as he has recovered from the coronavirus, but next week's debate with Democratic challenger Joe Biden has been canceled after he refused to take part in the proposed virtual format."Will be in Sanford, Florida on Monday for a very BIG RALLY!" the 74-year-old Republican president tweeted, as he struggles to turn around the dimming prospects of the Nov. 3 presidential election.Biden, the 77-year-old former vice president, has seen his lead over Trump widen to a double-digit margin in some national polls, followi…READ FULL ARTICLE