We have the word of several of our intelligence agencies that Russia did indeed influence our election. And there’s enough legitimate suspicion (based on anonymous sources) to merit further investigation into the collusion matter.
The fact that there’s no smoking gun for all to see yet isn’t exoneration of Trump and/or his campaign. Investigations are ongoing. And remember, it took over two years for the Watergate smoking gun to surface (and that was with a Congress determined to find out what really went on — not the current Congress determined to make a display of pretending to find out what really went on).