Disappointing as he’s a great guy who would’ve been a net positive, but continues the trend from 2022 of the highest-tier Republican recruits not running simply out of contempt for the idea of being in the Senate.
They are not running mostly because they don't think they could win the primary.
And even if they did they would have to spend 6 years of vitriol from their own voters, because they would vote for liberal legislation, omnibuses, bipartisan deals, ect.
Things that voters see as betrayal if they belong to the opposition party.
So why ruin their reputation ?