There are many other individual challenges that Frumin has yet to rule on. It's pretty difficult to tell which way the guy will go, though he does work for Democrats. I delved into the Senate Parliamentarian's politics in this story a few weeks ago.
Then, of course, there are the overall challenges by legislators like Rep. Michelle Bachmann (R-Minn.), who just wrote on this blog about her plans to challenge the constitutionality of Obamacare as a whole.
Are Buyers Picky?
The S&P 500 in Week 3 of August 2017
Opening Round NAFTA Fissures Over the Meaning of “Substantial”: What’s the Best and Worst That Can Happen?