Impeachment House managers began Day Two of their arguments before the Senate that President Clinton should be removed from office. Today, Representative Bill McCollum, a Florida Republican, attempted to sum up the facts and evidence presented so far. He was followed by other House prosecutors who attempted to buttress their assertions that Mr. Clinton is guilty of perjury and obstruction of justice. But two questions remain: Did the senators hear anything new, and can the Republicans make their case without calling witnesses? NPR's Peter Kenyon reports.