Maryland Poll: Mike Huckabee 17%, John McCain 56%, Ron Paul 10%.

Wisconsin Poll: Mike Huckabee 4%, John McCain 51%, Ron Paul 7%.

Texas Poll: Mike Huckabee 33%, John McCain 43%, Ron Paul 9%.

Maryland Poll: Hillary Clinton 33%, Barack Obama 52%.

Wisconsin Poll: Hillary Clinton 50%, Barack Obama 41%.

Ron Paul to Scale Back Presidential Campaign, Concentrate on Congressional Race

Mike Huckabee Vows to Continue Presidential Campaign

Virginia Poll: Mike Huckabee 25%, John McCain 57%, Ron Paul 9%.

Virginia Poll: Hillary Clinton 37%, Barack Obama 52%.

Virginia Poll: Hillary Clinton 39%, Barack Obama 59%.

Gallup National Polls Poll: Mitt Romney 26%, Mike Huckabee 21%, John McCain 40%, Ron Paul 3%.

Time Magazine National Polls Poll: Hillary Clinton 48%, Barack Obama 42%.

Gallup National Polls Poll: Hillary Clinton 51%, Barack Obama 40%.

Mitt Romney Cites National Security as Reason for Dropping Presidential Bid

Mitt Romney to Drop Republican Presidential Bid

Democratic Candidates Just Decimals Apart in Super Tuesday Results

Barack Obama Captures Georgia Primary

Missouri Poll: Mitt Romney 25%, Mike Huckabee 27%, John McCain 34%, Ron Paul 4%.

New Jersey Poll: Mitt Romney 24%, Mike Huckabee 5%, John McCain 53%, Ron Paul 4%.

Tennessee Poll: Mitt Romney 22%, Mike Huckabee 28%, John McCain 34%, Ron Paul 7%.