With the first vote of America's 2016 election a fortnight away, Republican presidential frontrunners Donald Trump and Ted Cruz dispensed with months of niceties and locked horns in a primetime debate.<br />The duo held an extended back-and-forth over conservative values and Trump's allegation that Cruz, a hardline Texas Senator born in Canada, might be legally blocked from becoming president.<br />With the February 1 nomination ballot in Iowa coming into sharp focus, Cruz who is running a close second to Trump in the state, accused the controversial mogul of panicking.<br />"Back in September, my friend Donald said he had his lawyers look at this from every which way and there was no issue there," said Cruz.<br />"Now since September, the constitution hasn't changed.<br />But the poll numbers have," he added.<br />"Donald is dismayed that his poll numbers are falling in Iowa."
