Despite caution from the White House, talk of a possible impeachment probe is quickening in the House. House Republican Whip Tom DeLay used a floor speech yesterday to call the allegations against the president serious and say lawmakers may have to act. DeLay’s remarks are seen as the bluntest yet on the subject of any member of the leadership. House Speaker Newt Gingrich and Judiciary Chair Henry Hyde said they’re considering several possible responses, should independent counsel Kenneth Starr refer evidence of possible impeachable offenses to lawmakers.