With the theatrics and tumult of the Republican National Convention behind us, many Republicans remain steadfast in their opposition to Donald Trump to be president of the United States. The reason is simple: Their conscience says he does not reflect their principles, nor those of our Republican Party. Trump's isolationist approach, bombastic rhetoric and ignorance of issues are not things we can be proud to support. The president is the commander in chief, a role model for our children and America's top ambassador to the world.