Should Democrats concentrate on swing voters or their base? Can more traditional Republicans win in the MAGA era? Tuesday's Senate primary in Texas will show the direction the parties are taking.
Republicans appeared eager to press the former president. Democrats said they hoped to use his appearance as precedent to demand that President Trump also answer questions.
The Trump administration for months ignored Congress's demand for a plan on how the Defense Department would spend the money that Republicans pushed through in their sweeping domestic policy bill.
