Earlier quoted context omitted.
How is this an issue of partisanship? This is the CIA hacking the Senate. It's not GOP vs Democrat or even Executive vs Judiciary vs Legislative. Besides, I think it can be entirely fair for newspapers to pose the question of "Is this tantamount to treason?", and let people decide for themselves.
It's the CIA looking at activity logs on CIA servers, to monitor what Senate users were doing, so they could interfere with the things the Senate found. It's shady, and likely illegal, but it's not quite hacking, and it's definitely not hacking the senate.
"How is this issue partisan?"