WASHINGTON -- Donald Trump thinks the United States will not see another black president for some time because Barack Obama has "set a very poor standard," the billionaire businessman, entertainer and Republican presidential candidate told ABC News on Sunday. Trump -- who has questioned whether Obama was born in the United States and was once sued by the Justice Department because the management of his apartment complexes allegedly discriminated against black tenants -- also thinks he'll win the black vote. Trump responded to a question on the show about a tweet he sent last year saying America would not see...