On Tuesday, in addition to electing federal, state, and local officials to a new term, voters in 37 states will decide on approximately 160 ballot measures, including statewide initiatives, proposed amendments to state constitutions, and legislative and popular referenda. The total number of ballot measures across the nation is down this year from recent highs in midterm election years - according to the Ballot Initiative Strategy Center, there were 224 ballot measures nationwide in 2002 and 226 in 2006.