Any relation to Elena Kagan?
Why don’t they engage Trump? Within the party there is room for debate.
good question.
Her father is an attorney, Robert Kagan. Do not know if it is the same Robert Kagan.
No, but he is part of the Kagan Clan: Robert and his brother Fred Kagan. Robert's wife Victoria Nuland and Fred's wife Kimberly Kagan.
Victoria Nuland had worked VP Cheney and she was hired into the State Dept to oversee Libya and became best known for the Benghazi talking points memo. Later she was put in charge of Ukraine.
Kimberly Kagan had started the Institute for the Study of War. Elizabeth O'Bagy worked for Kim Kagan and was very influential in shifting opinion on intervening in Syria. O'Bagy escorted John McCain on his trip to Syria to meet with the "good rebels".
Behind the scenes, the Kagans are very influential on foreign policy.