The speech is as it is, and is posted first. The candidate is, however, not unidimensional, with no struggles on an easy past, and just gives a good speech, and could catch Potomac fever if sent to DC. The Crabgrass outlook is not likely any change for the worse.
The story is more complicated than that. This is a legitimate candidate running because the chance came up and a very real sense of responsibility held, if he passed it up as an easy choice to dodge controversy and live out a happy life, he'd have lost something as a person at a time hard effort is required.
For a deeper view of the man's character, this interview. He had a time fighting his devils, making trust in him a far easier thing to feel. Don't be turned off by the video titling. You have an individual with a gounding to his life, which he tells as not having been an easy trip, to get to his candicacy.
Check it all out. And hope the ready guns of keeping people "in their place" do not take him out of the equation. We need Senators such as he'd be, presuming I judge correctly. Please follow those two links. Find the time. This is in its way an epic moment.