Des Moines Register: Iowa’s recent natural disasters are connected to global climate change, former Vice President Al Gore said in a speech at the state Democratic Party’s annual fall fundraiser Saturday. Gore was the keynote speaker at the 2008 Jefferson Jackson Dinner at Hy-Vee Hall in Des Moines. Gore, a former U.S. senator from Tennessee, lost the presidential election to George W. Bush in 2000. Last year, he won a Nobel Peace Prize for his effort to tackle global climate change. Gore …