In what’s become a recurring theme, the weekly addresses of President Obama and congressional Republicans offered a preview of the two sides’ political strategies heading into this fall’s midterm elections.

Mr. Obama and his fellow Democrats are pushing an income-equality agenda that includes a hike in the nation’s minimum wage and more federal investment into manufacturing, infrastructure, education, and other areas.

The GOP, on the other hand, continues to zero in on the president’s health-care reform law and its negative consequences, a tack the party is sure to continue heading toward the November contests.

In his weekly speech, the president touted the executive steps he took earlier this week, including the launch of two new “manufacturing hubs” to promote innovation, a $600 million infrastructure grant competition and other actions.