1. Ted Cruz is not shy about opening his mouth. He has said nothing about the Russians.
2. Outer Elbonia could have gotten into those emails, and a whole bunch of folks likely did. Plus, there were leaks, which are not hacks
3. No one has explocitly denied that the content of the emails are true.
They weren’t even ‘leaks’. They came to light when Podesta fell for a phishing scam. He was told it was a phishing scam, but he chose to click on the link provided to change his email PW ... and the rest is history.