GOP fight for delegates stretches to Puerto Rico

WASHINGTON — An upbeat Rick San­to­rum bar­reled into Puerto Rico on Wednes­day in pur­suit of another campaign-bending vic­tory in a Repub­li­can pres­i­den­tial race where sud­denly no pri­mary is too minor and no del­e­gate is con­ceded. Mitt Rom­ney put nearly $1 mil­lion into tele­vi­sion adver­tis­ing in Illi­nois, the next big-state showdown.