inside-the-Beltway

Short definition from Wiktionary

Adjective

1. 1
   Within the portions of Washington D.C., Maryland and Virginia encircled by Interstate 495. (The Washington Beltway)
2. 2
   Of or relating to things that occur in Washington, D.C., usually in relation to United States national politics.
3. 3
   Out of touch with sentiments of persons living outside of Washington, D.C.
4. 4
   Of or relating to New Zealand politics in the capital city of Wellington, New Zealand.