These numbers don't add up. The entire NSF budget (NSF is the primary federal source of funding for science research... individual state funding combined contribute around a third what the NSF does) for 2016 was just over 7 billion, with 6 billion of that for research. The allegation seems to be that about a third of that went to AWG research. I find the prospect that a third of their funds go to any single category difficult to believe without any evidence. (Reasonable minds may differ. Unreasonable minds believe whichever trending social media story best agrees with that they already think.)
By the way, I'm pretty sure the second largest source of federal funding for science comes from the NIH. They offer greater detail regarding their budget on their website. They spend about 7 million on climate change research each year.