“A little-noticed vote cast last year by Sen. Kamala Harris (D-CA) angered her fellow Democrats, but it also gave her a way to stand out from the crowd on the key issue of immigration if, as expected, she seeks the party’s presidential nomination in 2020,” Bloomberg reports. “Defying President Trump’s demand for $5.7 billion in wall funding is a unifying message for Democrats with the 2020 campaign already under way.