user: Question: How many total reason for change are listed corresponding to the successor Leonard B. Jordan (R)?
Columns: ['State (class)', 'Vacator', 'Reason for change', 'Successor', 'Date of successors formal installation']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['New Hampshire (2)', 'Styles Bridges (R)', 'Died November 26, 1961', 'Maurice J. Murphy, Jr. (R)', 'January 10, 1962']
SQL:

assistant: SELECT COUNT("Reason for change") FROM "Table" WHERE "Successor" = 'Leonard B. Jordan (R)';