Betting data from Intrade.com, an international prediction market where users wager real money on the outcome of world events, now suggest that the GOP will gain at least 35 seats in the House and 8 in the US Senate.
Intrade data summarized at ElectoralMap.net yields the map below for the November elections.
If the states ended up voting according to this map, the Republicans would end up with 49 seats (+8) in the Senate. Intrade also forecasts that at least 35 seats will be gained by the GOP in the House.