I think the issue with these leaks is manifold: bad press for Trump, which he hates; possible issues with staffer contact with Russians; possible cover-up by the WH; possible issues with interference with the FBI investigation.This type of low level leak, the President shouldn't waste his time on it, unless he seeks to prevent any information not approved by his administration from being reported in the press.
The only true way for this to end is to wait for the FBI to complete their investigation and see all of the facts. I think Trump and the WH would be best served by laying-low on this and wait it out. The more they stir the pot the worse it looks for them even if they end up being vindicated.