Providence, R.I. -- Fresh off their bruising defeat in Wisconsin's recall election on Tuesday, grassroots activists blamed the buckets of money that conservative donors spent to keep Gov. Scott Walker in office for their loss and decried the Democratic Party for turning a people-powered movement into a traditional partisan electoral coalition.At times their discussion on Friday at the liberal Netroots Nation conference, billed as a "post-mortem," slipped into nostalgia for the occupation of the state capitol last year.