Well yeah, it was a sham. But so is swearing in yourself as a President.
a) He didn't "swear himself in" he was sworn in by the duly elected congress as their leader.
b) His argument would be he's the most democratically elected person in the country.
c) He's probably right.
Don't forget:
d) His entire plan revolves around being President for a month until new elections can be had
and
e) apparently the Venezuelan Constitution says that when the Presidency becomes vacant the leader of the congress becomes President until a new election can be held. They are declaring that with the end of Maduro's first term and the 2nd election being widely recognized as a sham the Presidency is effectively vacant.
