SCOTUS review of EPA’s “Timing Rule” could deflate regulatory overreach

Presumably, the Supreme Court agreed to reconsider EPA's Timing Rule, which regulates stationary sources of greenhouse gases, because EPA then promulated its Tailoring Rule, under which by its own (quite possibly unlawful) authority EPA limited the Timing Rule's purview to large stationary sources and thus made greenhouse gases a different class of criteria pollutant than the ones initially regulated under the Clean Air Act. But what if the Court upholds the Timing Rule and strikes the Tailoring Rule? Would the nation stand for an EPA with an extra 230,000 soldiers in its army?