This is really really good reading because it doesn't just deal with Roger Stone, it talks about stuff involving a whole bunch of others, like Comey, McCabe, Clapper, Brennan, and many more.  Very interesting and short to read.

https://www.nationalreview.com/corner/the-issue-is-not-roger-stones-lurid-personal-life-but-equality-under-the-law/

Quote from article:

"If Stone lied under oath to Congress as Mueller alleges, then by all means prosecute him to the fullest.

But what exactly are the federal criteria that adjudicate when and where lying under oath to Congress or to federal authorities is a prosecutable crime? Is it perceived useful only in Robert Muller’s hunt for incriminating evidence against Trump, as in the case of Michael Flynn?

After all, nearly the entire Obama administration intelligence hierarchy not only lied under oath to Congress, but in some cases confessed to such."

But evidently we are all supposed to ignore their transgressions, or look the other way.  But not those associated with Trump's campaign where so far NO collusion or anything else has been found, at least nothing concerning the president himself.