Vice President Harris defends America's democratic ideals, while former President Donald Trump endangers them. To apply for a Homestead Exemption, you must submit the following to the Harris Central Appraisal District (HCAD):.The letter recognizes military or Department of Defense civilian retirees with (30) or more years of creditable service for retired pay. Over 700 highranking national security officials have endorsed Democratic candidate Vice President Harris in her run for the White House.