What service rules can do
He has submitted Medical Certificate
Only one thing remains, whether he intimated his sickness and said the MC will follow.
You have not issued any notice in the meantime
Someone has verbally complained with regard to his fighting elections
No evidence or written complaint
Even if you enquire Panchayat will say , he did not contest , as the Doctor will be of same village
Grant him leave on Medical grounds honoring Doctors Certificate .
If you want to raise his hypertension , the choice is yours .
But be Sure while you do this Your tension will also increase
Case is a Non Starter for the Administration unless Soild Proof is there . With Solid proof he can be terminated.