This has already been ruled on....and there was nothing to it. The whistle blower was likely just another anti-Trump employee of the left.
Lefties want to keep biting at the apple.
The initial reporting was by Greg Miller and Ellen Nakashima... Nakashima, according to an article by former arms inspector Scott Ritter, was the reporter who worked with the DNC and Crowdstrike [a Ukrainian-American company] on crafting the Russian hacking story to explain the appearance of DNC material on Wikileaks and set off the collusion meme.