A memo from Gov. Martin O'Malley's office claims furloughs of federal workers during a government shutdown could cost Maryland $5 million in income and sales tax revenues a day, according to The Washington Post .

Funding for basic government operations is set to expire Oct. 1, and stopgap legislation to keep the government running is enmeshed in a political fight over the Obama administration's healthcare law, the Affordable Care Act, commonly referred to as "Obamacare."

If Congress doesn't approve a bill by Oct. 1, basic federal government operations would halt, and workers would be without a paycheck until the funding is restored.