(By Sheryl Gay Stolberg, New York Times) President Barack Obama, striking a no-retreat, no-surrender posture in the wake of his party's defeat in the Massachusetts Senate race this week, vowed Friday to press on with his domestic agenda - including a health care overhaul and tough new restrictions on banks - even if it meant he had to "take my lumps" from political critics.Obama came to this Cleveland suburb for the second stop on his White House to Main Street Tour to spread the word that his administration is about jobs, jobs, jobs.