US President Donald Trump announced plans on Monday for a major “rally” in Washington on the July 4 Independence Day, further imposing his political brand on celebrations of the United States’ 250th anniversary.The announcement comes a day after the Republican billionaire staged a mixed martial arts fight on the White House lawn – on what just happened to be his 80th birthday – with military honour guards and Air Force flyovers.Trump had previously posted that another event on June 24 would be...