Well, as I discovered ENT for me, I made a tabula rasa and gave Trip a chance. First, I realized that CT's amazing acting skills compensating the weakness of writing. Second, his physical similarities with Bush Jr. was not intended. Braga told he was the only one who wanted the CT, TPTB's favorite was another actor. (I forgot the name but he does not look like Bush Jr. or CT) Well, with all my respect to him, I still think CT‘s face is not handsome with his unusual proportions.

Nevertheless, CT is „not“ Trip and Trip is sexy, funny, romantic, geek, engineer and very very likeable „real“ figure.
If that was what Braga said, then I take him at his word about the casting situation regarding Trinneer as Trip.
Nevertheless, when Tucker explained in "First Flight" how he got his nickname Trip, I couldn't help but think that the writers might have had some presidential inspiration, as crazy as my thinking may be; first the physical resemblance between Trinneer and Bush and then the origin of the character's name.
Tucker's formal name is Charles Tucker III. He explained that "Trip" was short for triple, meaning he was the third Charles Tucker of his family, or the triple "I"s in his name. The nickname "Trip" was to distinguish him from his father and grandfather, who were named Charles Tucker as well. George W. Bush has the same first and last name as his father. Bush Jr. is often referred to by his nickname "Dubya", which distinguishes him from his father. Both "Trip" and "W" are a play, or variation, on their formal names, and a way to distinguish each from their father (and grandfather in Tucker's case).
Anyway, enough of the Bush coincidences (real or imagined

), back to "First Flight". This episode was Enterprise meets The Right Stuff. It was a good story about Archer's days as a hotshot test pilot, competing for the chance to be the first human to fly at warp speed. There was even a cliche bar room fight scene in the episode.
The story was also interesting, imho, in that Archer and T'Pol reversed roles. In "Carbon Creek", T'pol was the story teller and Archer was the audience. This time Archer was the story teller and T'Pol was the captive audience.
T'Pol's tale sounded like a tall tale, at least to Archer. Her story was no where to be found in any history book. Interestingly, Archer noted that the account of that first flight was completely off the record as well.
I suppose that, in-universe, both the events in "Carbon Creek" and "First Flight" did happen. There was whimsy in the way T'Pol told her story, whereas Archer's story was straightforward and seemingly meant to be taken as in-universe factual by the viewer.