JULIE PACE, AP White House Correspondent WASHINGTON (AP) — President Barack Obama is expected to acknowledge that widespread problems with his health care law's rollout are unacceptable, as the administration scrambles to fix the cascade of computer issues. Obama was scheduled to speak Monday from the Rose Garden, his first health care-focused event since the scope of the problems became apparent. The troublesome rollout of the health care exchanges has been a glaring embarrassment for Obama's signature legislative achievement. White House officials say the president will discuss steps the administration is taking to address the failures, including ramping up staffing at call centers where people can apply for insurance by phone.