A Head Start teacher from Lehighton will be U.S. Rep. Ryan Mackenzie’s guest for the State of the Union Address. Sarah Arndt, a lead teacher at PathStone Carbon County Head Start, will accompany Mackenzie to President Trump’s address Tuesday evening, Mackenzie announced in a news release. Arndt has been a teacher at PathStone for 13 years. “The work of Sarah and her colleagues highlights the critical role early childhood education and child care…