OXFORD, Miss. (AP) — John McCain accused Barack Obama of compiling “the most liberal voting record in the United States Senate” Friday night as the two rivals clashed over taxes, spending, the war in Iraq and more in an intense first debate of the White House campaign. “Mostly that’s just me opposing George Bush’s wrong-headed policies,” shot back the Democrat. Obama said his Republican rival has been a loyal supporter of the unpopular president, adding that the current economic crisis is “a final verdict on eight years of failed economic policies promoted by President Bush and supported by Sen. McCain.” The two men were polite but pointed as they debated at close quarters for 90 minutes on the Ole Miss campus.