Does the 10-day veto window start on a bill when it is cleared for the White House or presented to the President?

Answer 1

It begins after the bill is presented to the President to sign it. Article 1, Section 7, Clause 2. If the time began on the day when it is cleared, meaning passed by both Houses of Congress and readied to be presented, Congress could hold it back for a few if not all the ten days and make it harder if not impossible for the president to veto it. A bill that is not vetoed within the ten day period becomes law after the ten days if the president does not sign it, unless Congress adjourns in that time and makes it impossible for the president to send the bill with his objection back to Congress.