The prediction had two key components:

1. "Republicans win one of the chambers. Probably the House."
   In the 2022 midterms, Republicans did flip one chamber: they gained control of the U.S. House of Representatives for the 118th Congress, winning a narrow majority (commonly reported as 222–213 or 221–214 depending on timing/estimates). (en.wikipedia.org) This directly matches both parts of the claim: at least one chamber and probably the House.

2. "I think the Senate is still up for grabs."
   This was framed as an assessment of uncertainty, not a directional call. At the time (August 2022 and up through Election Day), major outlets and analysts characterized control of the Senate as a toss‑up. (cbsnews.com) The eventual outcome was that Democrats retained and slightly expanded their majority in the Senate (a Democratic hold with a 51–49 edge including independents who caucus with them). (cnbc.com) Since he did not predict a specific winner in the Senate, merely that it could go either way, this part is not falsified by the result.

Because Republicans indeed won control of one chamber—specifically the House, as he said was most likely—and he made no incorrect concrete claim about the Senate outcome, the overall prediction is right.