I suggest an opposing congress would very likely offer more oversight than a same party congress simply due to bias.

Does Obama have the same oversight personnel? And even if they are the same, you surely agree that the same people do different things at different times, especially when the things they have oversight over (actions) are different. You got me to look this up. Consider this: "The House’s first act—de-clawing the Office of Congressional Ethics (OCE)—is a bad sign for congressional oversight and government accountability in the Trump era."
That's removal of some oversight. A republican congress would seem to want to support their guy all they can: https://www.justsecurity.org/35922/congressional-oversight-trump-era-strategic-choices/

As far a bias in the RG editorial, it's an editorial. But always good to see it.