WASHINGTON - Severe weather disrupted the marquee celebration of America’s 250th birthday on July 4, threatening a much-hyped rally and speech in Washington by President Donald Trump who has sought to stamp his mark on the anniversary.Tens of thousands who braved a suffocating heat wave to attend the event on the National Mall were ordered to evacuate several hours ahead of Trump’s address due to an approaching thunderstorm.Trump said he would deliver a speech “no matter what” .“Storms bring luck to whatever the occasion. They also make events a little bit more exciting! We will wait it out, I don’t...