LOS ANGELES — Rumbling into its final four weeks, the presidential campaign is playing out on both coasts and multiple fronts, with Republican Mitt Romney seeking stature on foreign affairs and President Barack Obama raising political cash by the millions.

Negative ads, charges of dishonesty and dwindling time are all setting the tone.

Joining celebrities for fundraising in Los Angeles on Sunday, Obama for the first time needled himself over a poor debate performance. But he declared he had the right focus and "I intend to win."