Trump campaign unveils 'Crooked Hillary' Snapchat filter before debate

Donald Trump is taking one final jab at Hillary Clinton before tonight's debate, via Snapchat.
On Monday, the Republican candidate's campaign launched a nationwide custom Snapchat filter that refers to his opponent as "Crooked Hillary." 
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The "Debate Day" filter, a possible appeal towards millennial supporters, allows Snapchat users to adorn their photographs and videos with the words "Donald Trump vs Crooked H