US presidential election: which candidate's strategy will work best regarding immigration?

While campaigning for the US presidency, Trump has vowed to carry out the biggest mass deportation in American history if he returns to power. The Democrats have, on their end, focused on more positive messaging on immigration - emphasizing border solutions, policy and helping immigrants adjust to life in the US. Which strategy will work best? Carys Garland discussed with Scott Lucas, Professor of International Politics at the University of Birmingham.