President George W. Bush's job approval rating soared after 9/11 to the highest on record in ABC/Post and Gallup polls dating to 1938, and spiked again after the start of the Iraq war. But Bush tanked as views of the war soured; he spent a record four years without majority approval and came within a single point of the lowest rating on record, set by Harry S. Truman in 1952. President Barack Obama's support started far higher but has declined amid continued economic discontent. (ABC News)