President Donald Trump will headline US Independence Day celebrations on Saturday with a speech and a show that seek to place him at the centre of the nation’s 250th anniversary.Trump has made no secret of his joy at presiding over the July 4 festivities, portraying the timing as a side benefit of winning a second term starting in 2025 – even as the Republican falsely claims he also won the previous election against Democrat Joe Biden.Celebrations will be held across the US to mark the...