7PM This episode's headline: Auto Industry: Looking to the Future; Defense & Immigration: What's in the Cards?; Mondale's Troubled Campaign; Sizing Up the Campaign. The guests include In Detroit: PAUL EISENSTEIN, Journalist; In Washington: NORMAN ORNSTEIN, Political Scientist; In Durham, New Hampshire: JOSEPH McQUAID, Manchester Union Leader; In New York: ALBERT SCARDINO, Georgia Gazette. Byline: In New York: CHARLAYNE HUNTER-GAULT, Correspondent; In Washington: JIM LEHRER, Associate Editor; Reports from NewsHour Correspondents: ALISTAIR CLARKE (Visnews), in London; JUDY WOODRUFF, with the Mondale campaign