This is why we have the president we do.  Every US intelligence agency (they are all non partisan) believes that Russia was involved with our presidential election.  They also believe that there is enough evidence to warrant an investigation as to whether or not anyone from the Trump organization was complicit with, and colluded with Russia in an effort to impact the election.  If meddling with the very core of our democracy isn't that important to you, then that would explain why still don't understand.