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Have they been even slightly specific as to what this tampering and or collusion is? --
Yes. Not saying these claims and accusations are accurate, but ...
- Wikileak of DNC emails that are claimed to have been taken by the Russians to benefit Trump. See January ODNI report.
- Social media flooding from Russian bots. Congress calls this "active measures" This is the mind altering ray gun aspect.
- Adam Schiff: " According to Steele's Russian sources, Page is offered brokerage fees by such an on a deal involving a 19 percent share of the company. According to Reuters, the sale of a 19.5 percent share of Rosneft later takes place with unknown purchasers and unknown brokerage fees. Also, according to Steele's Russian sources, the campaign has offered documents damaging to Hillary Clinton which the Russians would publish through an outlet that gives them deniability like WikiLeaks. The hacked documents would be in exchange for a Trump administration policy that de-emphasizes Russia's invasion of Ukraine and instead focuses on criticizing NATO countries for not paying their fair share."
Schiff's remarks in the March 20 Congressional Hearing "make the case," which to my eye, is the kind of case that is made when in a fever. Schiff has conspiracy theories involving Flynn, Stone, Manafort, Carter Page, and others.
Schiff, like most liberals, is a mentally unbalanced liar.