Hillary Clinton Leads National Poll Released by Associated Press Ipsos poll conducted by Ipsos Public Affairs

Ipsos National Polls Poll: Hillary Clinton 46%, Barack Obama 41%.

Hillary Clinton Leads National Poll Released by USA Today/Gallup Poll

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

John McCain Leads Virginia Poll Released by Mason Dixon

Virginia Poll: Mike Huckabee 27%, John McCain 55%, Ron Paul 5%.

John McCain Leads National Poll Released by Newsweek Poll conducted by Princeton Survey Research Associates International

Newsweek National Polls Poll: Mike Huckabee 32%, John McCain 51%, Ron Paul 6%.

John McCain Leads National Poll Released by USA Today/Gallup Poll

Gallup National Polls Poll: Mike Huckabee 21%, John McCain 53%, Ron Paul 5%.

Barack Obama Leads Virginia Poll Released by Rasmussen Reports

Virginia Poll: Hillary Clinton 37%, Barack Obama 55%.

Barack Obama Leads Virginia Poll Released by Mason Dixon

Virginia Poll: Hillary Clinton 37%, Barack Obama 53%.

Barack Obama Leads Maryland Poll Released by Rasmussen Reports

Maryland Poll: Hillary Clinton 31%, Barack Obama 57%.

Barack Obama Leads National Poll Released by Newsweek Poll conducted by Princeton Survey Research Associates International

Newsweek National Polls Poll: Hillary Clinton 41%, Barack Obama 42%.

Hillary Clinton Leads National Poll Released by USA Today/Gallup Poll

Gallup National Polls Poll: Hillary Clinton 48%, Barack Obama 43%.

John McCain Leads Maryland Poll Released by Survey USA

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

John McCain Leads Wisconsin Poll Released by American Research Group

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

John McCain Leads Texas Poll Released by IVR Polls (IVRPolls.com)

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

Barack Obama Leads Maryland Poll Released by Survey USA

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

Hillary Clinton Leads Wisconsin Poll Released by American Research Group

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

John McCain Leads Virginia Poll Released by Survey USA

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

Barack Obama Leads Virginia Poll Released by Insider Advantage / Majority Opinion Research

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

Barack Obama Leads Virginia Poll Released by Survey USA

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

John McCain Leads National Poll Released by USA Today/Gallup Poll

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

Hillary Clinton Leads National Poll Released by Time Poll conducted by ABT SRBI

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