Story highlights Sen. Elizabeth Warren slammed Donald Trump on Twitter

The Massachusetts Democrats jabbed the GOP nominee over claims of a "rigged election"

(CNN) Elizabeth Warren resumed her role as Donald Trump's chief antagonist on Wednesday, firing off a series of tweets blasting the Republican presidential nominee's recent claims that the election is "rigged."

"Give me a break, @realDonaldTrump," the Massachusetts senator said . "You're not losing because it's rigged. You're losing because we see through your creepy bullying."

Give me a break, @realDonaldTrump. You're not losing because it's rigged. You're losing because we see through your creepy bullying. — Elizabeth Warren (@elizabethforma) October 19, 2016

Warren tweeted at Trump several more times on Wednesday morning, at one comparing the real estate mogul to a child.

"Anyone with children knows that whining about imaginary cheating is the last refuge of the sore loser, @realDonaldTrump," she said

Anyone with children knows that whining about imaginary cheating is the last refuge of the sore loser, @realDonaldTrump. — Elizabeth Warren (@elizabethforma) October 19, 2016

"It's not rigged, @realDonaldTrump," Warren added in another tweet. "You're losing fair & square. Put on your big-boy pants because this is what accountability looks like."

It's not rigged, @realDonaldTrump. You're losing fair & square. Put on your big-boy pants because this is what accountability looks like. — Elizabeth Warren (@elizabethforma) October 19, 2016

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