Today we update New Hampshire, Colorado, Minnesota, Kentucky, Virginia and Kansas in our round-up of polls on Senate races. CQ Politics is also changing its rating on the New Mexico race from "Leans Democrat" to "Democrat Favored."

To keep up with our race ratings, you can also go to our Senate Races to Watch page. Here's a summary of the categories:

• No Clear Favorite, for races that are deemed to close to call.

• Leans Democratic and Leans Republican, for highly competitive races in which the named party is perceived to have at least a slight edge, but in which an upset is a highly plausible possibility.

• Democrat Favored and Republican Favored, for races in which the named party has a clearer advantage and is likely to win, though an upset cannot be completely ruled out.

• Safe Democratic and Safe Republican, for races in which the named party is viewed as certain to win.

Today we update Ohio ("No Clear Favorite"), Michigan ("Leans Democrat"), New Hampshire ("No Clear Favorite"), New Mexico ("No Clear Favorite"), Pennsylvania ("Democrat Favored"), Virginia ("Leans Republican"), Florida ("No Clear Favorite"), Minnesota ("Leans Democratic"), North Carolina ("Leans Republican"), Georgia ("Republican Favored"), New Jersey ("Safe Democrat"), South Dakota ("Safe Republican") and Wisconsin ("Leans Democrat") in our round-up of state-by-state general election match-ups between Barack Obama and John McCain.

Visit our Presidential election maps which give you four different ways to look at the race, including one that lets you build your own electorial scenario.

Here's a summary of our race ratings categories. Use this link for background on how we arrive at them

• No Clear Favorite, for races that are deemed to close to call.
• Leans Democratic and Leans Republican, for highly competitive races in which the named party is perceived to have at least a slight edge, but in which an upset is a highly plausible possibility.
• Democrat Favored and Republican Favored, for races in which the named party has a clearer advantage and is likely to win, though an upset cannot be completely ruled out.
• Safe Democratic and Safe Republican, for races in which the named party is viewed as certain to win.

We're updating Minnesota today and New Hampshire. The new New Hampshire poll contradicts one we posted yesterday.

• Minnesota: Republican first-termer Norm Coleman is in a statistical tie with Democrat Al Franken , leading him 44 percent to 43 percent in a Rasmussen Reports poll conducted July 23. Eight percent prefer another candidate, 5 percent are undecided and the margin of error is 4.5 percent. Frank leads 49 percent to 46 percent if "leaners" are counted. Coleman is seen favorably by 57 percent of voters and Franken by 60 percent. A SurveyUSA poll conducted July 11-13 had Coleman ahead by 52 percent to 39 percent with 8 percent undecided. The margin of error was 3.9 percent. Check out our story, "Franken Stumbling in Minnesota Senate Race." CQ Politics changed the rating on this the race from "No Clear Favorite to "Leans Republican."

Today, we update Ohio, Georgia and New Jersey and add New Hampshire.

• Ohio: Obama is leading McCain 48 percent to 40 percent with 12 percent undecided in a Public Policy Polling survey conducted July 17-20. The margin of error is 3 points. Last month, PPP had Obama ahead 50 percent to 39 percent in contrast to SurveyUSA and Rasmussen Reports polls that had them neck-and-neck. McCain leads among white voters (85 percent of the sample) by 46 percent to 42 percent but Obama has a big 91 percent to 6 percent advantage among black voters (12 percent of the sample). Obama also leads by 33 points among the 15 percent of the sample that is under 29. Obama leads by 20 points among women but lags McCain 7 points among men. Quinnipiac University had Obama ahead 48 percent to 42 percent in a June 9-16 poll. The margin of error was 2.6 percent.