Ohio Poll: Hillary Clinton 44%, Barack Obama 44%.

Ohio Poll: Hillary Clinton 56%, Barack Obama 42%.

Texas Poll: Mike Huckabee 35%, John McCain 55%, Ron Paul 5%.

Texas Poll: Mike Huckabee 29%, John McCain 57%, Ron Paul 6%.

Texas Poll: Mike Huckabee 33%, John McCain 57%, Ron Paul 7%.

Ohio Poll: Mike Huckabee 29%, John McCain 59%, Ron Paul 5%.

Ohio Poll: Mike Huckabee 28%, John McCain 59%, Ron Paul 9%.

Texas Poll: Hillary Clinton 47%, Barack Obama 48%.

Texas Poll: Hillary Clinton 50%, Barack Obama 44%.

Texas Poll: Hillary Clinton 48%, Barack Obama 49%.

Ohio Poll: Hillary Clinton 51%, Barack Obama 42%.

Ohio Poll: Hillary Clinton 50%, Barack Obama 44%.

Ohio Poll: Hillary Clinton 51%, Barack Obama 42%.

Ohio Poll: Hillary Clinton 54%, Barack Obama 44%.

Ohio Poll: Hillary Clinton 49%, Barack Obama 45%.

Texas Poll: Mike Huckabee 38%, John McCain 50%, Ron Paul 6%.

Texas Poll: Mike Huckabee 36%, John McCain 53%, Ron Paul 5%.

Ohio Poll: Mike Huckabee 24%, John McCain 53%, Ron Paul 7%.

Ohio Poll: Mike Huckabee 33%, John McCain 50%, Ron Paul 10%.

Ohio Poll: Mike Huckabee 29%, John McCain 58%, Ron Paul 4%.