Kamala Harris' challenge in a 2020 presidential bid? Defining herself before her opponents do

Kamala Harris' challenge in a 2020 presidential bid? Defining herself before her opponents do: Sen. Kamala Harris is casting herself as a newcomer to Washington with a relatable personal story and the toughness to take on President Trump, while Republicans and her likely Democratic opponents are calling her too liberal to win nationwide, and too inexperienced in Washington.