Mitt Romney made his announcement via a phone app and asked supporters to spread the word.
The ticket-mates arranged their first joint appearance later in the morning at a naval museum, the initial stop of a bus tour through four battleground states in as many days. The USS Wisconsin, berthed at the museum, was their bunting-draped backdrop.
“This is the worst economic recovery in 70 years,” Ryan said in remarks prepared for delivery. “Whatever the explanations, whatever the excuses, this is a record of failure” on the part of President Barack Obama, he added.