The campaign to re-elect Senate Minority Leader Mitch McConnell, R-Ky., has released a strong web ad praising the Republican lawmaker for standing up against President Obama for the past four years.The 3 minute video is entitled "Refuse to be Defeated", and documents McConnell's opposition to the president's agenda in a positive light. It begins with Mr. Obama's acceptance speech and finds several clips praising McConnell for blocking key legislation in the Senate.Check it out:McConnell isn't up for re-election until 2014, but a day before the 2012 primary appears to be the official launch of his campaign. The ad also appears to be aimed at GOP voters as another sign to any potential Tea Party challenger to think twice before going up against the powerful Kentucky lawmaker.