HARRISBURG, Pa., April 21 (UPI) -- Undecided voters tend to pick U.S. Sen. Hillary Clinton, D-N.Y., which could help her win in Tuesday's Pennsylvania presidential primary, analysts say.

WASHINGTON, April 16 (UPI) -- Democratic U.S. presidential hopeful Barack Obama has released an Internet ad attacking his rival Hillary Clinton's ties to lobbyists, his campaign said.

MALVERN, Pa., April 10 (UPI) -- Hillary Clinton's camp has accused Democratic foe Barack Obama of trying to buy the Pennsylvania primary with an extensive and misleading TV ad campaign.

WASHINGTON, March 31 (UPI) -- Hillary Clinton's Democratic U.S. presidential campaign is raising a lot of money and has good cash flow, her communications director said Monday.

WASHINGTON, March 24 (UPI) -- Hillary Clinton's campaign Monday criticized rival Barack Obama's campaign for fighting dirty in the Democratic race for U.S. president.

WASHINGTON, March 10 (UPI) -- Democratic presidential hopeful Hillary Clinton's campaign said Monday that rival Barack Obama lacks the foreign policy credentials to be U.S. president.

WASHINGTON, March 7 (UPI) -- Democratic presidential hopeful Hillary Clinton's campaign has surged since winning the Ohio and Texas primaries this week, campaign officials said.

WASHINGTON, March 6 (UPI) -- After her wins Tuesday in Texas and Ohio, Democratic presidential hopeful Hillary Clinton's campaign accused rival Barack Obama of Ken Starr-like tactics.

WASHINGTON, March 3 (UPI) -- Democratic presidential hopeful Barack Obama's campaign Monday defended a campaign adviser's meeting with the Canadian government on trade.