California Poll: Hillary Clinton 39%, Barack Obama 40%.

California Poll: Hillary Clinton 40%, Barack Obama 46%.

CBS News National Polls Poll: Hillary Clinton 41%, Barack Obama 41%.

Gallup National Polls Poll: Hillary Clinton 46%, Barack Obama 44%.

Missouri Poll: Mitt Romney 29%, Mike Huckabee 29%, John McCain 32%, Ron Paul 5%.

Missouri Poll: Mitt Romney 27%, Mike Huckabee 31%, John McCain 29%, Ron Paul 4%.

Tennessee Poll: Mitt Romney 18%, Mike Huckabee 24%, John McCain 23%, Ron Paul 4%.

Tennessee Poll: Mitt Romney 29%, Mike Huckabee 23%, John McCain 32%, Ron Paul 8%.

Alabama Poll: Mitt Romney 20%, Mike Huckabee 30%, John McCain 38%, Ron Paul 5%.

Illinois Poll: Mitt Romney 20%, Mike Huckabee 15%, John McCain 43%, Ron Paul 4%.

New York Poll: Mitt Romney 24%, Mike Huckabee 6%, John McCain 61%, Ron Paul 5%.

New York Poll: Mitt Romney 30%, Mike Huckabee 8%, John McCain 49%, Ron Paul 4%.

California Poll: Mitt Romney 32%, Mike Huckabee 8%, John McCain 39%, Ron Paul 4%.

California Poll: Mitt Romney 37%, Mike Huckabee 12%, John McCain 34%, Ron Paul 5%.

Missouri Poll: Hillary Clinton 42%, Barack Obama 44%.

Tennessee Poll: Hillary Clinton 36%, Barack Obama 31%.

Tennessee Poll: Hillary Clinton 49%, Barack Obama 35%.

Alabama Poll: Hillary Clinton 46%, Barack Obama 41%.

Illinois Poll: Hillary Clinton 24%, Barack Obama 55%.

New York Poll: Hillary Clinton 54%, Barack Obama 38%.