Washington (AP) -- Senator Elizabeth Warren has taken to Twitter to attack what she calls presumptive Republican presidential nominee Donald Trump's "toxic stew of hatred & insecurity."
The Massachusetts Democrat issued a series of tweets Tuesday night as results from the Indiana GOP primary forced Texas Senator Ted Cruz from the race and left Trump as the overwhelming favorite for the nomination.
Warren tweets that Trump has built his campaign on "racism, sexism and xenophobia" and that there's more enthusiasm for him "among the leaders of the KKK than leaders of the political party he now controls."
Warren says what happens next is "a character test for all of us -- Republican, Democrat, and Independent."
Warren has been mentioned by party insiders as a potential running mate for likely Democratic nominee Hillary Clinton.