fever swamp

noun7

1. •
   An area of stagnant water and hot temperatures that acts as a breeding ground for disease vectors such as mosquitos.

   • Then Christmas Day dawned, and there was Vicksburg lifted two hundred feet above the fever swamps, her court-house shining in the morning sun. — 1901
2. •
   A group of political extremists or an area that is dominated by them.

   • Only a few years earlier, the neocons had been denouncing them as coming from "the fever swamps", in the words of Decter. — 2010
3. •
   Group of political extremists.

   • The community has been the focus of the fever-swamp for years, with pundits insisting it's a terrorist training camp. — 2017
4. •
   Disease-ridden swamp.

   • It was so hot in this fever-swamp that his water requirements would be prodigious. — 2006
5. •
   Alternative form of fever swamp.
6. •
   A set of extreme and crazy political positions.

   • It is worth it, before making a final comment on the grander points involved, to climb out of the polemical fever swamps and look with a little detachment on the purely economic question. — 2012
7. •
   Extreme political positions.

   • Among those caught up in the fever-swamp was Karl Rove, the architect of George W. Bush's two White House wins. — 2014