She isn't in DC. She's in her home in New York when she's not traveling.
She's a private citizen who is entitled to go wherever she chooses.
She is doing what she wants, which is currently living rent free in the head of weak minded conservatives, and right wing loons.
Which is 99.9% of that crowd.
I actually enjoy watching her make their blood pressure boil, and wish her many more years of causing them ill health due to that fact.