http://www.thebulletin.us/site/index.cfm?newsid=20210273&brd=2737&pag=461&dept_id=576361
. ."at the inauguration. . he's aware he's not a citizen, then it's a perjured oath.". .
Understanding that the Oath of Office was perjured might shed some light on the odd behavior all around, when the Oath was administered, twice, once in private.