It's interesting because the Left believes that balance of power is now favoring conservatives, but it's just not because Roberts is certainly not one. I'm not saying this because he wants an investigation into Kavanaugh. This guy saved Obamacare and other Leftist policies, along with some conservative ones. In my opinion, Roberts is a moderate. The way SCOTUS looks right now is the following: 4 conservatives, 1 moderate (or Leftist, depending on what Roberts is identifying as that day), and 4 Leftists. There's no doubt Kavanaugh is far more conservative than Kennedy in every way imaginable and will have an impact in some areas, but overall, the balance of power within SCOTUS has NOT had a huge swing. Now, if Ginsberg, 85 years old, goes during Trump's administration, THEN we can talk about SCOTUS having a big shift. Even greater yet would be if, for whatever the reason, Justice Breyer, 80 years old, retired during one of Trump's terms. We know Trump has a list of constitutional conservatives on his list, so it would be a big deal if one or two Justices retired and the spot(s) were filled by with a person(s) from that list.
My guess will be if one of those Justices stepped down, judge Amy Coney Barrett, I'm betting, will be next. If she is, the hysteria and craziness over Kavanaugh from the Democrats and the rest of Left wing nut cases will seem like foreplay compared to what they have planned for this woman (which the Left claims to be the champion of women and claims that all women need to be believed). I'm not exaggerating that, either. Look at what they did to Sarah Palin, Michelle Bachmann, Condalisa Rice, Juanita Broaddrick, Laura Ingraham, Dana Loesch, Candace Owens, Melania Trump, Ivanka Trump,Sarah Huckabee Sanders, Ann Coulter, Kirstjen Nielsen, Nikki Haley, Kellyanne Conway (who is a rape victim), and many others. They make stories, call them all sorts of names, and, many on the Left, want these women to be raped by either a single person or gang raped. To say the Left is the protector of women and their rights is like saying Hitler loved Jews. But to bring it back to the topic at hand, this whole Kavanaugh thing is just the beginning and it WILL get worse as time goes on with him and anyone else Trump or the Republicans get behind.