Back in May, a lot of us Democratic bloggers took note, and heart, from the first in a series of tracking polls of all 50 Governors’ approval ratings by the polling outfit SurveyUSA.The latest SUSA tracking poll, as Chris Bowers of MyDD quickly noted, shows some significant changes, especially in the states affected directly and indirectly by Hurricane Katrina. Indeed, while Katrina has helped push George W. Bush’s approval ratings to their lowest levels ever, the disaster is helping several GOP governors.With the exception of Kathleen Blanco of Louisiana, virtually every Governor with a significant role in Katrina relief or recovery got a tangible bounce. In the following list, the first number is the governor’s approval/disapproval rating in the September 16-18 SUSA tracking, while the second (in parenthesis) is his ratio in the May poll.Haley Barbour (R-MS) 58/39 (37/55)Bob Riley (R-AL) 58/37 (36/52)Rick Perry (R-TX) 49/45 (38/48)Mike Huckabee (R-AR) 58/38 (51/41)Sonny Perdue (R-GA) 61-34 (47/40)Perdue’s Georgia wasn’t hit directly by Katrina, but did suffer some storm and tornado damage; he got a lot of ink for immediately calling the legislature into a special session to approve a gasoline price gougingbill.One Democratic Governor benefitted from an “Ophelia effect:” NC’s Mike Easley, whose approval ratio improved from 52/34 to 64/30.The “Katrina effect” helps three incumbent Republican Governors up in 2008 who were and may still be in some political peril, Rick Perry, Sonny Perdue and especially Bob Riley. The latter faces a primary challenge from “Ten Commandments” Judge Roy Moore, and a potentially tough general election opponent in Lt. Governor Lucy Baxley. (Riley got some more good news today when his predecessor, Don Siegelman, formally announced he was challenging Baxley for the Democratic gubernatorial nomination, ensuring an expensive and possibly divisive primary).Barbour’s boost not only gets him out of the political woods in Mississippi (where he doesn’t face re-election until 2007), but also provides some fuel for the previously laughable boomlet of support for the ol’ rascal to run for president in 2008.All these effects are probably temporary, and all these Republican beneficiaries have lots of other problems. Perdue, for example, is presiding over a significant economic slide in a state that has known little but boomtimes for much of the last two decades. In Alabama, Roy Moore’s supporters are going to back him against Riley come hell or high water. And in both these states GOPers remain vulnerable to slow-developing fallout from the Jack Abramoff/Ralph Reed Indian Casino Shakedown Scandal.Outside the Katrina Region, the SUSA tracking polls don’t show a great deal of movement. Among Democrats, Ed Rendell (PA) and Phil Bredesen (TN) have slipped a bit, but both still look like solid bets for re-election. Mark Warner (VA) now has an approval/disapproval ratio well over two-to-one (66/29), which could help his designated successor, Tim Kaine, this November. Christine Gregoire of Washington has climbed from 34/58 in May to 45/49 in September.And the bottom five Governors are all Republicans: Blunt (MO), Fletcher (KY), Schwarzenegger (CA), Murkowski (AK) and Taft (OH). Ah-nold was already in trouble in May, with a ratio of 40/56; now he’s down to 32/65, in polling done about the time he announced his re-election bid.All in all, it’s a timely reminder that national issues cut differently in the states, and that whatever happens with Congress, there’s an enormously important series of pitched battles going on over governorships across the country.