What is this based on? Everything I've read up to today, even ignoring the confirmation events, has indicated that Kavanaugh is not a desirable choice for those on the left side of the political spectrum.

As of last week, Rasmussen (a conservative polling firm) was sampling support for impeachment of Kavanaugh.

It's possible that Kavanaugh is completely ignoring the topic, and has dedicated himself to the high-minded topic of jurisprudence. It's also possible that he is aware of such polling and is building support should the winds change.

https://en.wikipedia.org/wiki/Brett_Kavanaugh_Supreme_Court_...

No he wasn’t. He was considered a partisan hack at best and was less popular than most previously confirmed justices.

He did get approval from the Amy Chuas and Neal Katyals and Akhil Amars but that says more about elite Ivy League in-groups than anything else.