The Democratic Party will open its four-day national convention in Chicago on Monday to showcase new presidential nominee Kamala Harris and the party’s agenda as the race for the White House nears the final stretch. On the eve of the political fanfare, the party released its themes for the forthcoming days: “For the People,” “A Bold Vision for America’s Future,” “A Fight for Our Freedoms” and “For Our Future.” Harris, the sitting U.S. vice president, and her running mate for the Nov. 5 presidential election, Minnesota Gov. Tim Walz, are due to deliver speeches on the final and penultimate nigh…