One of the worst things about the Senate tax reform bill prior to conference committee is that it delayed implementation of corporate tax rate cut until 2019. It did this so the bill could fit under the 10-year window beyond which the Senate's goofy budget rules demand there be no projected deficit increase. (And if you want to know what's wrong with that, we've discussed it at length.)
The House bill made the corporate cut effective in 2018, because the House doesn't have to comply with the Senate's idiotic rules.
Good news: It's now coming out that the conference committee report makes the cut effective in 2018. The price we paid for this is that the rate's being cut from 35 percent to 21 percent, instead of to 20 percent. But it's still a massive cut and it still takes effect right away. That's a big win for those of us whose priority is to see this tax reform prioritize economic growth: