Which were the most important issues during the presidential election of 2008?
economic downturn and environmental protection
two overseas wars and economic downturn
two overseas wars and campaign spending
environmental protection and campaign spending

The most important issues during Presidential election of 2008 were Option 2: two overseas wars and economic downturn

Explanation:

The result of Presidential elections of 2008 was historic in United States because people elected an African American, “Barack Obama” became the U.S. President. The voter turn-out was high as well.  There was economic slow-down as real estate market of U.S had collapsed. Americans needed a change after the two wars in Iraq and Afghanistan which had led to economic crisis, The Great Depression.

Thus, these were the two important Presidential issues during the elections in 2008.