Seems like a no brainer...Do it! If they do cancel the program, you will likely have one of the last ones ever handed out and yours will expire last essentially. By then, the mid-term election will come and gone so the atmosphere might be a little different. Use this time to gather up IDs, save money, etc.
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Late 40's Dreamer (Holy Fucking shit I'm almost 50 and still dealing with this), aged out of original DACA and didn't have a chance to apply for extended DACA after Republicans killed it on the vine.