Ohio, Wisconsin, Nevada and North Carolina are sure wins.
Arizona, Georgia, and Pennsylvania are probable wins.
New Hampshire conceivable but probably out of reach.
Washington, Colorado, likely out of reach.
Result: 53 Republican senators
At least 52 are needed to prevent the likes of Mitt Romney becoming the Republican equivalent of Joe Manchin and holding the party hostage.
If that happens (GOP takes Senate by 3 and the House), the democrats will mobilize their foot soldiers and there will be riots and destruction.
Mark my words.
Nevada is a tossup. Polling in difficult in Nevada but tends to overestimate Republicans. Senators Angle and Heller can verify this.