"a de/a do/aquela do..
02 narratives collided: that of the the inauguration ritual and
that of Donald Trump.
A do ritual da investidura no cargo (de presidente) e do Donald Trump.
A do ritual da investidura no cargo e aquela (história/relato = narrative) do Donald Trump.
I filled the gap with "AND" since it leaves helps the reader to understand it better, in case the writer has ommited it.
To me, there are two versions of the event, one official and other that is of Trumps choice, not necessarily agreeing with the actual stuff (or at least not the perception of the reporters.)
Or perhaps the writer sees an interesting mosaic, with different versions of the event. (so he is not biased, just an expectator seeing the events unfold.)http://www.ldoceonline.com/dictionary/collide3 if two very different ideas, ways of thinking etc collide, they come together and produce an interesting result