US president-elect Donald Trump has questioned the White House's motive behind ordering an investigation into alleged Russian hacking of the Democratic Party's servers and emails of campaign officials of Hillary Clinton. <br/><br/>Trump in a tweet, asked, if Russia or some other entity was hacking, why did the White House wait so long to act. He said, why the process is in action after Hillary Clinton lost the elections.<br/><br/>Trump's tweet comes days after the White House said that President Barack Obama has issued orders for an investigation into alleged hacking into the servers of the Democratic National Committee and of emails of Clinton's presidential campaign aides.<br/>