Arpaio was giving her a tour of tent city, got her inside.
I don’t think he “crashed” anything, its his facility (he is responsible for it) and she was a visitor.
He stated on fox news that the only thing she was concerned about was the heat, it was like 120 out that day and she is from Vermont, not exactly a hot climate.
From the clip it seems as if he was nice to her and she was nice to him.
On behalf of my fellow gulf war vets let me assure you that we don't give a rip about missus bernie's concerns over 120 degree heat.