SlateStone Wealth chief market strategist Kenny Polcari identifies tech stocks opportunities and the potential market reaction to the midterm elections on 'Varney & Co.' This Fourth of July marks the 250th anniversary of the founding of the U.S., and while Americans around the country are celebrating the occasion, it also serves as an opportunity to reflect on what helped make the U.S. the world's largest economy and the reasons it's still a great place to invest. Joseph P. Quinlan, head of CIO market strategy for Merrill and Bank of America Private Bank, authored a piece breaking down the 10 reasons…