I would think that considering the level of unpopularity connected to Bush is only because of what Spino said. He is being blamed for some decisions that weren't his. It isn't to say he isn't unpopular or the best president, but he isn't the worst president. If anything, he'll probably come out on top, somewhat akin to Woodrow Wilson. See below link

1920 U.S. Election
If you read the article, you'll realize how unpopular the Democrats were across the country, and how badly Wilson was hated.
Harding's victory remains the largest popular-vote percentage margin (26.2%), 60.3% to 34.1%, since the election of 1820.
and
Warren Harding's main campaign slogan was a "return to normalcy", playing upon the weariness of the American public after the social upheaval of the Progressive Era. Additionally, World War I and the Treaty of Versailles proved deeply unpopular, causing a reaction against Wilson who had pushed especially hard for the latter.
Wilson involved the US in numerous wars from the Philippines to Latin America, and into Europe. He made almost everyone unhappy, and persecuted hundreds with Palmer raids on "Communists" and "Anti-Espionage" acts that took away more rights than Bush has ever taken away. I wouldn't be surprised if he did authorize alot of torture. He's also the first president to segregate the bureaucracy, forcing blacks out of government positions.

All in all, Bush isn't soooo bad. But he is pretty bad.