President Donald Trump has signalled the theme of his 2020 bid for reelection: racism.<br />CNN reports Trump this week raised a false and racist conspiracy theory about Joe Biden's running mate, California Sen. Kamala Harris.<br />Trump's move elevated the efforts of the alt-right to portray her Harris as 'other' because of her mixed-race heritage.<br />Sen. Harris was born in Oakland, California, to an Indian mother and a Jamaican father. Both of Harris's parents were legal immigrants to the US.<br />Harris is the first Black and South Asian American woman on a major party ticket.<br />Trump is running the most racially-charged presidential campaign that America has seen since the 1968 run of former Alabama Gov. George Wallace.