Twitter mourns former first lady Barbara Bush

Former first lady Barbara Bush, respected by people on both sides of the political spectrum, is dead at 92.

Bush was the wife and mother of former presidents, a position that she carried with grace and elegance. She was also a tireless advocate for literacy and her foundation supported  several family literacy projects in Georgia.

Twitter was filled with condolences and tributes to Bush, who had been in poor health for a while.Recently, her family said, she decided to forgo medical treatment and focus, instead, on comfort care.