The Guardian reports that, with the exception of Maryland congressman John Delaney, no viable challengers to President Trump have announced their candidacy, but the "2020 presidential campaign is on."
It’s a crisp fall weekend and more than a half-dozen prominent Democrats are in states that hold early primaries. Former vice-president Joe Biden is in Nevada. Two senators, Cory Booker and Kamala Harris, are in South Carolina. The former Virginia governor Terry McAuliffe is in New Hampshire and Colorado governor John Hickenlooper is in Iowa. It is October 2018. The 2020 presidential campaign is on.