Is JD Vance Prepared to Be President Before the Mid-Terms?

Or when Trump resigns, is impeached or removed by the 25th should Vance do what is better for the country and turn over the presidency to Speaker Mike Johnson?

(If Johnson passes on the opportunity, 92-year old Sen. Charles E. Grassley (R-IA), the President pro tempore of the United States Senate, would be next in line. After that, it's Secretary of State Marco Rubio.)

And say Vance DOES become president if Trump leaves the presidency AFTER the mid-terms AND the Democrats control either the House or Senate,Vance would have a very difficult time getting a vice president nominee confirmed.