America's political past is the subject of three new paperbacks from the Norton Library: The Presidency of George Washington by Forrest McDonald [$3.45], Daniel Webster and the Trial of American Nationalism, 1843—1852 by Robert F. Dalzell, Jr. [$4.95] and The Politics of Provincialism, The Democratic Party in Transition, 1918—1932 by David Burner [$3.95]. Bantam has weighed in (weight: two-and-a-half pounds) with William Manchester's mammoth—and, according to Potomac pundit James Reston, "magnificent"—history of America from 1932 to 1972, The Glory and the Dream [$6.95]. Another look at America, more grim than glorious, is You Have Seen Their Faces [Arno Press, $6.95]. First published in 1937, with text by Erskine Caldwell and photographs by Margaret Bourke-White, the work depicts the terrible and tragic lives of Southern sharecroppers in the 1930's.