William Cummings | USA TODAY

The odds on MyBookie favor Republicans maintaining hold of their majority, even as political forecaster Nate Silver says there is an 84.9 percent chance of a Democratic victory .

As of Sunday, the odds of the GOP keeping the House are at -140. That means you would need to bet $140 on the Republicans to win $100 if they stay in the majority. The Democrats are at +110, meaning a $100 bet would win you $110 if the Democrats manage to wrest control of the House.