Gov. Ed Rendell Monday blasted the GOP and Republican presidential nominee John McCain for what he says is their 'dishonorable' attempt to mislead the American public about Barack Obama's tax plan.

'The entire Republican National Convention, virtually every speaker lied about Senator Obama's tax plan,' said Rendell, speaking on a conference call to reporters. 'Their TV ads continue to lie.

'It's the big lie strategy,' he continued. 'Say if often enough and it will stick.'

Rendell said Obama's tax plan would provide relief to 95 percent of American families, as opposed to McCain's, which would continue to reward the rich, he said.

He spoke to reporters a day before McCain and his runningmate, Alaskan Gov. Sarah Palin, campaign in Lancaster. The governor held a press conference there Monday to show a letter that asks McCain to stop 'misleading the American people about taxes.'

A state committee member, Rendell said, will try to deliver the letter to McCain Tuesday.