This is pretty shocking, though I guess it makes some sense. Small states like ND really like having Senate seniority (except when that seniority is Senate Minority Leader, apparently ).
Leadership can be a mixed blessing. A leader has to take positions on behalf of the national party, and that can put them at odds with local wishes. Leaders also spend a lot more time in other states/districts helping fellow members and that costs time that could be spent at home.
Yes, that's true. Also, Senate leaders spend more time promising other Senators pork, rather than bringing it home for their own.