(File image) Republican presidential nominee Mitt Romney (left) shakes hands with President Barack Obama at the start of the first 2012 US presidential debate in Denver.

Globs of used gum used to vote for president. CNN's Jeanne Moos reports on how to stick it to the candidates.

Globs of used gum used to vote for president. CNN's Jeanne Moos reports on how to stick it to the candidates.