President Obama is unveiling a new economic agenda, including $50 billion in new spending and tax breaks designed to spur growth and expansion for small businesses.  But will any of it do any good?  Will the tax breaks accomplish much if the Bush tax cuts are allowed to expire?  And should be be bearish or bullish on where the economy is headed over the next couple of years?  We ask Brian Wesbury, former chief economist for the Joint Economic Committee of Congress.