Hillary Clinton's approval rating falls to 79 percent

WASHINGTON D.C. -- President Hillary Rodham Clinton suffered a setback on Tuesday with a new Rasmussen poll showing her approval rating falling to merely 79 percent.

538's Nate Silver said Rasmussen's methodology means its findings are subject to an anti-Clinton "house effect," meaning that structurally, they tend to overstate her unpopularity.

"We'll see how durable these negatives prove to be," he told his colleague 538's senior write Clare Malone. 

Malone speculated that the government shutdown may be responsible for Clinton's falling approval ratings. "The public doesn't care why it shut down, whether it was Republicans' fault or Democrats' fault. They just want to know she's getting something done."