From the Associated PressRepublican candidate for Indiana governor Jim Wallace says the state can boost its economy by spending $500 million on infrastructure and new tax credits for business.Wallace, an Indianapolis businessman, outlined a broad plan Thursday that he's asking lawmakers to support during the next legislative session. He says the state should spend from its cash surplus to pay for the plan.He's also seeking to expand land-based casino gambling. He says it's a natural step for Indiana which has the third-largest gambling industry behind Nevada and New Jersey.Wallace is running in the Republican primary against Rep. Mike Pence. Former Indiana House Speaker John Gregg is running on the Democratic side and former ``Survivor'' star Rupert Boneham is running for the Libertarian Party.Gov. Mitch Daniels is term-limited against running for re-election next year.