Let’s assume a 6-player 5/5 table with a Mississippi straddle from the button up to $20. To make the math easy, let’s also assume that everyone limps back to the Button. He then announces a pot-sized raise.
He has no call to make, so the pot is currently 120. Does he make his total bet 140?
Do we count the straddle bet as part of the pot in order to calculate the raise?