The new United States Ambassador has asked that New Zealanders give him, and US President Donald Trump, a fair go. Mr Brown received a powhiri and a military guard of honour at Government House, before showing his credentials to the Governor-General Dame Patsy Reddy. Mr Brown is a former US Senator and served in the National Guard for 35 years, reaching the rank of Colonel. He replaces Mark Gilbert. He was also an early supporter of Mr Trump's presidential campaign. He has described himself as a "social moderate but a fiscal conservative". He is joined by his wife Gail Huff. Mr Brown said New Zealand was his first choice for a diplomatic posting. "I said that this is the country I want to go and I could have had a choice of anywhere. "[Donald Trump] trusts me, he understands that I'm very direct…