Nope Renee unfortunately thats not true in the US. Even if only 20% of the popluation vote the electoral college will cast their votes and a new president is elected (or retained). We have a very odd system of democracy here.
In the last few elections the Republicans staged telephone campaigns to voters in lower economic areas and told them that the voting dates had changed or that they were to report to a different polling place. They did this knowing that the majority of their power base lies with upper middle class and wealthy voters. So here was an example where a party went out of its way to lower overall votes to steal an election. They use every dirty trick in the book here.