Speaking in the Rose Garden, Obama says not passing an extension because of politics would be "inexcusable". The president was joined by several transportation workers, as well as labor union and business leaders, two groups that often are at odds.
At issue is renewal of a transportation spending bill that expires Sept. 30. The Senate proposal would last only two years and cost $109 billion. The House is considering a longer, six-year bill that could cut spending from current levels.
Obama also is calling on Congress to pass clutter-free legislation extending the Federal Aviation Administration's operating authority, which expires in mid-September.