(CNN) - Seeking to raise the expectations for its rival, Sen. Hillary Clinton's campaign said Friday that Sen. Barack Obama needs to sweep the March 4 primaries.
The Illinois senator should win all four states - Ohio, Texas, Rhode Island and Vermont - decisively, given the amount of money and resources he has devoted to them, the Clinton campaign said in a memo circulated to reporters.
"If he fails to garner big wins, there's a problem," the memo states.
"The Obama campaign and its allies are outspending us two to one in paid media and have sent more staff into the March 4 states. In fact, when all is totaled, Senator Obama and his allies have outspent Senator Clinton by a margin of $18.4 million to $9.2 million on advertising in the four states that are voting next Tuesday."
"Senator Obama has campaigned hard in these states," the memo continues. "He has spent time meeting editorial boards, courting endorsers, holding rallies, and – of course – making speeches."
The memo came out moments after Obama campaign manager David Plouffe finished a conference call with reporters, during which he said the New York senator needs big victories in Texas and Ohio Tuesday if she hopes to chip away at Obama's now 153 pledged delegate lead - according to CNN's latest estimate.
"The Clinton campaign needs to begin wining big states by big margins to have any hope of eliminating this delegate lead they are facing," he said.
- CNN Ticker Producer Alexander Mooney