Former United States President George Herbert Walker Bush is in a hospital in Houston, Texas. He is sick with sepsis, an infection of the blood. A spokesman said Bush was admitted for medical treatment Sunday, the morning after the funeral of his wife, Barbara. On Monday, spokesman Jim McGrath wrote on Twitter that the 93-year-old former president is "responding to treatments and appears to be recovering." Barbara Bush was buried on Saturday. Mrs. Bush was 92 years old. She and her husband had been married 73 years the longest presidential marriage in U.S. history. Three other former presidents and their wives joined George H.W. Bush at the funeral. The three are their son, George W. Bush, Bill Clinton and Barack Obama. Melania Trump, wife of President Donald Trump, also was among the mourners.