Delegates to the Washington State Democratic Convention on Saturday cheered U.S. Sen. Patty Murray and Democrats in Congress, applauded the call to create clean-energy jobs, differed on whether to endorse a marijuana legalization initiative, nominated two of their own in this year’s congressional races — and managed to squeeze in most of the World Cup match between the U.S. and Ghana during their lunch break.A total of 714 voting delegates attended the convention proper at the Clark County Events Center, a cavernous venue that left plenty of empty space around the folding chairs. In contrast, nearly 1,200 delegates attended the state GOP convention at the Hilton Vancouver Washington two weeks ago.Two messages dominated the day: Democrats are the party that represents the middle class, and Americans can’t afford to turn back the clock to 2008.“Voters are anxious and confused,” said Washington Democratic Party Chairman Dwight Pelz. “Americans are looking for answers. I truly believe Americans are trying to decide which party cares about the middle class.”“We cannot go backward,” said U.S. Rep. Brian Baird, D-Vancouver. “The last time it happened, we had a young, charismatic president,” Baird said, invoking 1994, when six of Washington’s then eight congressional seats shifted from Democrats to Republicans midway through President Clinton’s first term.