<p>CEDAR FALLS, Iowa (AP) — Republican presidential candidate Ted Cruz ramped up his attacks against GOP rival Donald Trump on Tuesday, accusing the billionaire businessman of having "New York values" and questioning his foreign policy credentials.</p>
<p>It was the latest round in an escalating rivalry between the two outsider candidates, who are locked in a virtual tie in polls in the early-voting state of Iowa. Cruz's sharper rhetoric shows that the detente between the two has ended as they fight to win over voters less than a month before the state's kick-off caucuses.</p>