Hillary Clinton announced her choice of Virginia Senator Tim Kaine as her vice-presidential selection on Friday and, of course, Trump used the moment to mock Elizabeth Warren.In yet another effort to divide Democrats as the DNC Convention in Philadelphia approaches, Trump took to Twitter on Saturday morning to bully the Massachusetts Senator because she wasn t picked as Clinton s running mate. Pocahontas wanted V.P. slot so badly but wasn t chosen because she has done nothing in the Senate,  Trump wrote before adding,  Also, Crooked Hillary hates her! Pocahontas wanted V.P. slot so badly but wasn t chosen because she has done nothing in the Senate. Also, Crooked Hillary hates her!  Donald J. Trump (@realDonaldTrump) July 23, 2016Once again, the Republican nominee mocked Warren s Native American heritage and belittled her effort to fight for poor and middle class Americans in the US Senate.But Warren didn t let Trump get away with it and she responded by giving Trump bad news. I m right where I want to be, @realDonaldTrump,  she wrote.  Calling you out & holding you responsible for your reckless vision for America.  I m right where I want to be, @realDonaldTrump: Calling you out & holding you responsible for your reckless vision for America.  Elizabeth Warren (@elizabethforma) July 23, 2016One would think Donald Trump had learned his lesson about attacking Elizabeth Warren by now. After all, when he threw a temper tantrum by call her  lazy,  as well as a  fraud  and  Pocahontas  last weekend because she shredded his veep choice Indiana Governor Mike Pence, Warren ripped him a new one for it with a series of tweets that were a direct hit on how Trump is the REAL fraud.Here s just a few of them.You want to talk about who s a fraud, @realDonaldTrump? How about this? https://t.co/5UB05u8L4x pic.twitter.com/sTQrNKOoA1  Elizabeth Warren (@elizabethforma) July 17, 2016 Or this, @realDonaldTrump? https://t.co/HPPihIjqpX pic.twitter.com/dbhtFbhYF0  Elizabeth Warren (@elizabethforma) July 17, 2016Or this, @realDonaldTrump? https://t.co/Ji9khMUbw6 pic.twitter.com/buEtsLMjfn  Elizabeth Warren (@elizabethforma) July 17, 2016 Or this, @realDonaldTrump? https://t.co/3ernRrO7q3 pic.twitter.com/wld65MAdsj  Elizabeth Warren (@elizabethforma) July 17, 2016Seriously, I could do this all day, @realDonaldTrump  https://t.co/Q6Tv3m1SdX pic.twitter.com/Me3CULGxTI  Elizabeth Warren (@elizabethforma) July 17, 2016 You re nothing but a thin-skinned bully and a lousy, cheating businessman, @realDonaldTrump. The sham is over.  Elizabeth Warren (@elizabethforma) July 17, 2016Seriously, Donald. Stay down. Elizabeth Warren has already kicked your ass several times. You don t want to mess with her. Unless you like getting destroyed by strong women. In that case, just wait till November and you ll receive the biggest beating of all.Featured image via Jeff Swensen/Getty Images