The vote on a resolution of no confidence, to be sponsored by Senators Charles E. Schumer of New York and Dianne Feinstein of California, could come as early as next week, Democrats said. Such votes of censure or condemnation are uncommon, although a handful were held in the 19th century, Congressional historians say. In 1886, the Senate adopted such a resolution against President Grover Cleveland’s attorney general, A. H. Garland, because he had refused to provide documents concerning the firing of a federal prosecutor.