Originally Posted by
sackett
There were no telegraph or railroads when the Constitution was written, and a senator might be absent for good reason: his horse foundered, or his keelboat grounded on a shoal, or he fell ill with the flux while mud-stuck on the Choctaw Trace.
Nowadays, we have internet, and a senator could cast his vote while on a fact-finding mission in Ouled Nail or Tijuana or Bangkok (love that name, haw haw!), and it would be plumb legit. Dunno if the rules allow that, but why not?
"Present" doesn't have to mean physically there anymore. THIS NOT THE 18TH. *******. CENTURY.
The Senate rules require a senator to be physically present in order to vote.
A quorum is is required for voting - described as a simple majority of elected senators.
A majority of senators not required as a quorum is presumed unless an absence of a quorum is officially tabled.
A fifth of the senate is required to support the tabling for a suggestion of absence of a quorum.
A PDF of the rules as at March 26, 2020
https://crsreports.congress.gov/product/pdf/RL/96-452