Veteran pollster Frank Luntz said President Donald Trump made a grave error by mocking people’s concerns about “affordability” during Tuesday’s State of the Union address.

Nearly two-thirds of speech-watchers liked what they heard from President Donald Trump ’s State of the Union speech Tuesday night, a CNN poll found.

President Donald Trump, in the longest State of the Union Address in history, talked about fraud and corruption in Minnesota, and got into a scuffle with U.S. Rep. Ilhan Omar, a Democrat from Minnesot...