David Lewis
...that David Lewis and his son Stephen Lewis served simultaneously as the leaders of the Canadian and Ontario New Democratic Party?
...that <b id="mwCcM"><a class="mw-redirect mw-disambig" href="./David_Lewis_(politician)" id="mwCcQ" rel="mw:WikiLink" title="David Lewis (politician)">David Lewis</a></b> and his son <a href="./Stephen_Lewis" id="mwCcU" rel="mw:WikiLink" title="Stephen Lewis">Stephen Lewis</a> served simultaneously as the leaders of the <a href="./Canada" id="mwCcY" rel="mw:WikiLink" title="Canada">Canadian</a> and <a href="./Ontario" id="mwCcc" rel="mw:WikiLink" title="Ontario">Ontario</a> <a href="./New_Democratic_Party" id="mwCcg" rel="mw:WikiLink" title="New Democratic Party">New Democratic Party</a>?