An Oklahoma Republican senator clashed with a CNN anchor on Thursday as he refused to definitively answer whether he would vote to certify election results that go against former President Donald Trump — and repeatedly tried to downplay and deflect from Trump’s 2020 plot to block certification of the election. Sen. Markwayne Mullin insisted to anchor Pamela Brown he would certify the results, but only “if the elections are certified underneath the standards that they put forth.” He was referencing repeated false claims made by Republicans that several battleground states refused to follow thei…