Yes Pence is young and vital enough to run in 2024.
However millennials and "snowflakes" will have come of age by then and easily be the tipping point to pull the entire population and electoral votes into the majority.
But and if there is a stabilizing of the conservative right and Pence runs in 2024, be prepared for the biggest smear campaign in political history probably even worst than the Kavanaugh debacle.
Then again, politically speaking, 2024 is centuries away.
Anyway, the Lord will return before then.