Two-thirds of middle-class military families are feeling as anxious about a possible government down later on this month as they did in the fall of 2013.

The First Command Financial Behavior Index shows 66 percent of commissioned officers and non-commissioned officers making at least $50,000 are in households that are worried about another shutdown. The general population is a bit less worried, as 52 percent say they're anxious about a shutdown.

"Looming prospects of another government shutdown are creating a complex mix of emotions for our nation's career military families," said Scott Spiker, chairman and CEO of First Command Financial Services.

"The last shutdown led to interruptions in and cancellations of active duty work and training and in some cases directly affected the daily lives of service member families," he said. "But these families have seen Congress avoid a number of potential government shutdowns in recent years, so they remain optimistic that lawmakers will ultimately find a path forward."

Despite that concern, 78 percent of military families think Congress will eventually make a deal to avoid a shutdown. That's actually more than the general population; about 60 percent of civilians are confident in Congress' ability to come to an agreement.

About 530 people were polled and the margin of error is 4.3 percent.

Government funding expires in late April, and if Congress doesn't act to extend funding, parts of the government would be shuttered.