ans-irs- regulations-1 13484 (quoting a senator's aim to use "the power of the purse" to "push back on the regulatory overreach" of the IRS and EPA); Douglas A. Berman, Mixed Outcomes for Marijuana Reform Efforts in Latest Omnibus Spending Bill from Congress, Sent'g L. & Pol'y Blog (Dec. 16, 2015), hitp:-//sentencin