I've been considering that myself.
A low grade civil war would be an excellent justification for bigger and better power grabs. Don't underestimate the political capitol to be had from a domestic crisis.
Meh, I dunno. The War on Drugs is beneficial to criminals, same as Prohibition. Same with most other Wars on Nouns. War on Terror is mostly profitable to defense contractors. Some scumbag countries have made some money off the process, though.
War on Guns would not be profitable to US gun manufacturers. Maybe PRC or Russian gun manufacturers whose products will now compete on the US black market. So... No profit is pushing it domestically. And difference between Wars on Most Nouns and a War on Guns, is that politicians at all levels would be targeted. By either or both sides. I'm not advocating this. It would be costly in money, lives and liberties. I'm merely stating that in a modern Civil War (even low grade one), politicians would be targeted. More than a few Iraqi or Afghani politicians got plastered.
Hence, I don't see intentionally starting a low grade civil war to be a high priority of the political classes. Maybe by middle and senior bureaucratic ranks primarily interested in empire building.