U.S. space exploration inspired a generation of students and innovators, but NASA’s role has diminished, and the number of global space competitors is growing.

President Trump has made reducing the U.S. trade deficit a priority, blaming trade deals like NAFTA, but economists disagree over how policymakers should respond.

Relations between the two countries, long bound by common interests in oil and security, have strained over what some analysts see as a more assertive Saudi foreign policy.

The U.S. transport system is badly in need of infrastructure investment, and the country could suffer competitively if the status quo persists.

Spending on research and development is important to a globally competitive economy, but a crucial U.S. advantage appears to be eroding.