Scale? What scale?
On teh last and boring TV political debate in Spain, graphics was the latest toy contendants liked to use. Rajoy, the conservative candidate, used false scales, ina way that he could have used bars of the size he liked. If Zapatero, the socialist leader, lied or not with his graphics is harder to know. His 'White Book' (as he called it) was so white that you'd need more than a good TV to know what he was showing.
If you want to know more... Juantxo Cruz advices to use graphics on tv debates, on VisualMente (spanish)