Possible Clues:

• Supporters meeting about a head of state in Russia
• Range where Prometheus was bound
• Party meeting encompasses a small range on Europe's fringe
• Mountain region between Caspian and Black seas
• A Pole enters political meeting in the mountains
• American language, partly nasal, is hard to imitate
• Mountain system between Black and Caspian seas
• Region including Georgia, Armenia, etc
• Influential group, as in mountainous region
• Party meeting covers a singular range