I have no data to back this up; but it seems clear to me that paying attention every day to the doings of idiots, sociopaths, and idiotic sociopaths must be bad for the heart. (Both in the "blood pressure" sense and in the "hope for humanity" sense.)
What's really aggravating about political news for close watchers is that things happen every day, but very few things turn out to be important. Now, it's easy to imagine bad laws being adopted in the middle of the night when no one is looking; and that's stuff we should pay attention to.
And the whole Komen-Planned Parenthood kerfuffle is another example of something that's worth paying attention to. (In the same way that Netflix's split was worth paying attention to: it's a bad decision and some pushback from clients and donors might be enough to reverse the decision.)
But Ann Coulter saying something mean and dumb? Not news. Number-free essays on how the unemployment numbers have changed? Need data--and a grain of salt.. Endless pontificating about which Republican will win which state? Just wait and see.
So, as with all things, I'd recommend moderation when paying attention to politics daily.