Wesley Clark is expected to endorse Democratic presidential contender John Kerry tomorrow. Officials say Clark plans to join Kerry -- the front-runner for the party nomination on the campaign trail in Madison, Wisconsin, to formally give Kerry his support. Clark spokesman Matt Bennett would not confirm the endorsement, and would only say, that the retired general is looking forward to going to Wisconsin to be with Senator Kerry. Kerry has racked up wins in 12 of 14 Democratic contests and hopes to add Wisconsin to his win column. The backing of Clark, who registered in the low double digits in earlier Wisconsin polls, could increase Kerry`s advantage in a state with 72 pledged delegates at stake. The Southern-bred Clark dropped out of the race for the White House yesterday after disappointing third-place finishes in Tennessee and Virginia.