He'd be better than McMullin(who I don't think could win the primary anyway) But I'm not sure why he'd want it. Wasn't one of his sons considering it some years back? If any of them want a political career this seems like a good option.
Apparently Romney's son is considering a run for Utah Governor in 2020. It is possible that Mitt runs for Senate in 2018 and wins, with his son running for governor in 2020 and winning that.
Hmm. I'd think the other way would work better. And I'd really favor that, just to have Mitt tie with Houston for being the governor of two separate states.
Though I suppose Romney could serve for one term and keep the seat warm for his son for after he served one term as governor.