President Barack Obama “guarantees a permanent war” with Republicans by forcing the party’s hand on the issue of income-tax hikes on top earners, former House Speaker Newt Gingrich said Sunday. “The president won,” Gingrich said on NBC’s Meet the Press. “The president has a very clear, simple position. He wants to prove he can dominate, and he proves he can dominate by getting the rates up, and he has a veto pen.” …