Gail Collins: Who can make Trump miserable this fall?

I hope by now you’ve managed to come to grips with the fact that we’re no longer going to have Jeff Sessions in our lives.“It’s been a real adventure for me,” Sessions said in his concession speech this week, after he lost the Republican Senate nomination to a former football coach whose biggest campaign moment probably came when his bus caught on fire.Not clear which adventure Sessions was referring to — scampering out of the Senate to become President Donald