Yes, Chris Christie was there.
Was Kelly Ann Conway ? Mike Lee (doubt it), Thom Tillis (doubt it)? The man from Notre Dame was not there.
More likely was the rose garden.
They were all at Rose Garden. But Chris was at debate cause he helped prep Trump.
I think that the indoor reception after the announcement in the Rosegarden needs to be investigated. Very few transmissions are known to have occurred from outdoor interaction, though hugging people you do not live with does not seem wise.