Why is Trump SO AFRAID of The Russian Investigation? What's He Hiding? Conspiracy to Defraud The USA Presidential Election?

https://www.theguardian.com/us-news/2018/aug/01/donald-trump-russia-latest-news-jeff-sessions

Trump pushes Jeff Sessions to end Mueller's Russia investigation 'right now'. President rages on Twitter against ‘terrible situation’ and says attorney general ‘should stop this Rigged Witch Hunt right now.

https://www.wsj.com/articles/is-president-trump-illegitimate-1532126338

Is President Trump Illegitimate? Did Russia Provide Enough Help to Make Trump Win 2016 Election. Should He Resign? Should He Go Back To Russia?