Reuters: U.S. President Barack Obama will unveil a $2.3 billion tax credit on Friday to boost jobs by promoting clean energy, as fresh data showed that the country’s unemployment remains stuck in the double digits. The White House said the credit, from funds already earmarked under a $787 billion stimulus package Obama signed last February, would create 17,000 new U.S. jobs and would be matched by an additional $5 billion in private capital. High unemployment is one Obama’s most …