I think they were alluding to Trump's now notorious penchant to flip flop and waffle on every decision he makes. It's why the TACO Trump meme sprang up and cont

I think they were alluding to Trump's now notorious penchant to flip flop and waffle on every decision he makes. It's why the TACO Trump meme sprang up and continues to be used in reference to him – Trump Always Chickens Out.