Examples

Universal Health Care 
Raising Taxes/Tax Reform 
Immigration/Border Control 
Freedom of Religion 
Abortion/Parital Birth Abortion
Gay Marriage Stem Cell Research 
Isolationism/Foreign Intervention 
Guns/Arms Control 
Freedom of Expression (i.e. South Park depiction of Prophet Muhammad)
Education 
Patient's Rights/Physician Assisted Suicide 
Animal Rights 
Obesity 
Gender Equality