Mitt Romney to Endorse Sen. John McCain

Wisconsin Poll: Mike Huckabee 27%, John McCain 45%, Ron Paul 7%.

Wisconsin Poll: Hillary Clinton 41%, Barack Obama 45%.

Former Clinton Campaign Manager Endorses Obama

Wisconsin Poll: Mike Huckabee 32%, John McCain 53%, Ron Paul 7%.

Ohio Poll: Mike Huckabee 36%, John McCain 50%, Ron Paul 6%.

North Carolina Poll: Mike Huckabee 40%, John McCain 45%, Ron Paul 5%.

Wisconsin Poll: Hillary Clinton 39%, Barack Obama 50%.

Ohio Poll: Hillary Clinton 56%, Barack Obama 39%.

North Carolina Poll: Hillary Clinton 40%, Barack Obama 50%.

Virginia Primary Results: Barack Obama Continues to Roll, Tops Hillary Clinton Again

Virginia Poll: Mike Huckabee 37%, John McCain 48%, Ron Paul 7%.

Virginia Poll: Mike Huckabee 39%, John McCain 47%, Ron Paul 4%.

Maryland Poll: Mike Huckabee 23%, John McCain 54%, Ron Paul 7%.

Maryland Poll: Mike Huckabee 26%, John McCain 52%, Ron Paul 10%.

Maryland Poll: Mike Huckabee 27%, John McCain 53%, Ron Paul 11%.

Ipsos National Polls Poll: Mike Huckabee 30%, John McCain 44%, Ron Paul 9%.

Gallup National Polls Poll: Mike Huckabee 25%, John McCain 56%, Ron Paul 6%.

District of Columbia Poll: Hillary Clinton 27%, Barack Obama 63%.

Virginia Poll: Hillary Clinton 38%, Barack Obama 60%.