.  host: north dakota, south dakota, nebraska, kansas anon anon. they tend to vote republican  most tend to be well removed from washington. i looked at all presidential visit to the state of the past three and a half decades, looked at another spreadout by state. i said what if you allocated these according to population unelected the ones who get more state than the population would predict a number of visits and population would predict and it is the key electoral state that tend to be disproportionally visited. was this not just in election years, but are her presence turns about this and we've seen this fairly consistent since ronald reagan, but we've had  spike in the disproportionate focus in the key states in lesser presidency, george w. bush's presidency and barack ama obama's. >> host: what you teach at the u.s. naval academy? >> guest: i teach courses on the presidency of campaigns, elections, politics generally and occasionally course on the congress. it's a wonderful place to teach. >> host: are