That's not a counter-argument. You're introducing a hypothetical with no substantiating evidence, trying to create a parallel to a situation where we have unambiguous evidence of non-classified devices and software being used to discuss classified material. The onus is on you to prove the claim, not on others to prove a negative.
It has been eight years since Obama's presidency, had there been any use of this hardened BlackBerry for classified communications it would have emerged by now. Similarly, all messages on that device were subject to the Presidential Records Act, and are archived by NARA. You can FOIA them if you want to.
There were also no claims made during his administration that he ignored security protocols. Even his insistence on retaining a BlackBerry for unclassified communications was done through a compromise and an NSA-hardened device, not by ignoring the rules.
Similarly, how do we know that Reagan didn't hold cleartext phone calls with his aides on the Top Secret plans to contain the USSR? We don't, but in the absence of any supportive evidence over the years it's safe to assume he did not.
My statements were complete. You were not completing them, but trying to spin them in a way that implies wrongdoing when no evidence exists of it. I can only presume you're doing so for partisan reasons, to try to defend the actions of the current administration.
Whatever the reason, I have made my case. Feel free to make yours with a similar level of evidence.
> I can only presume you're doing so for partisan reasons
Speak for yourself.
My voting record is public and it's all green and blue. That's actually independently verifiable, unlike most of what you've said. When you haven't enthusiastically contradicted yourself or your sources, condescended, assumed, and accused. You interpreted mild skepticism and a willingness to discuss it as political opposition. Wild.
How do you expect to convince red voters this way? A suggestion: when you next make the attempt, try to resist your urge to dunk on them, and work to find something to agree with them about. Build on that. Give your enemies a golden road on which to retreat.