………. ………. ………. ………. ………. ………. ………. ………. ………. ………. ………. ………. ………. ………. ………. ………. ………. ……….NEW YORK — Democrats won’t pick their nominee for another year, but President Donald Trump and former Vice President Joe Biden are acting like the 2020 presidential contest is already a two-man race.Almost completely ignoring his 23 Democratic competitors , Biden has been laser-focused on Trump — particularly his embrace of racist rhetoric . But it has been Trump’s recent focus on Biden that has surprised both his allies and critics, who believe the Republican president may be unintentionally elevating someone whose candidacy is barely a month old.Trump’s advisers have privately encouraged him to lay off Biden. He has done the opposite, lobbing more public insults at the former vice president than any other Democrat over the month. Trump’s latest attack was perhaps his most brazen: During a state visit to Japan on Monday, he agreed with North Korean leader Kim Jong Un’s recent description of Biden as a “low-IQ individual.”A Biden campaign aide on Tuesday called the comments “beneath the dignity of the office.” The campaign said it waited a day to respond out of respect for Memorial Day, a holiday that…