Many thanks, I never would have guessed it was Tenn.
Here’s a PDF, if anyone wants to read it:
Thanks again.
Edit: I deleted the URL, since looking around that website, it appears to not be very scrupulous about copyright. But I found it with the most obvious google search, so it’s up to you.
A guy with telekinetic powers goes to the president (?) and threatens to use them if his demands aren’t met. As he’s leaving the office, a guy on the other side of the door kills him with a head blow from a hammer.
That’s kinda sorta similar to a Joe Haldeman story about a scientist on the Moon who goes a little crazy when he’s fitted with cyborg limbs. No telekinesis and no President in it, though: More Than the Sum of His Parts - Lightspeed Magazine