MADISON, Wis. (AP) – Democratic legislative leaders say a $500 million budget surplus must go toward public schools.  The Legislative Fiscal Bureau reported Thursday that the state’s budget will end about $500 million better than originally estimated when Gov. Scott Walker released his two-year spending plan in February.   Democratic leaders Sen. Chris Larson and Rep. Peter Barca say the new money must go toward schools to help offset cuts they saw in the previous budget.  Barca says “there can be no more excuses for the Republicans’ continued lack of funding for the education of our public school children and job training for our workers.”  Larson says using $500 million for school spending would be a “significant improvement” over Walker’s budget which froze school spending.