After rousing opening acts, Clinton to make case for the White House

By Amy Tennery and Jonathan Allen PHILADELPHIA (Reuters) - Democrat Hillary Clinton will make her case for the White House on Thursday night, facing the tough task of equaling show-stopping speeches by President Barack Obama and others who have embraced her bid to become the first woman elected U.S. president. Known as a more effective politician in small gatherings than as a big-event speaker, the former secretary of state has a hard act to follow after Obama and his wife, Michelle Obama, and V