Answer:
It would be an internal summary.
Explanation:
There are four kinds of connectives when it comes to speeches: signposts, transitions, internal previews, and internal summaries. Internal summaries briefly list what has been discussed in the speech up to that moment. They make it easier for the audience to keep up with the presentation, and reinforce the information that has been given. That is precisely what we have in "Let’s take a moment to go over what we have found so far. First, we have seen that firearm sales at gun shows too often put weapons in the hands of criminals. Second, we have seen that there is almost no accountability for gun-show dealers who sell to criminals." Notice that these topics have already been discussed and are now being summarized and reinforced.
