>> i think my base relies very much on common sense and they rely on me in terms of telling them what's happening. >> reporter: the president was asked how his pledges this time around are any different after the parkland shooting when he made promises and didn't follow through. the president said he never said then what he's saying now. but after the parkland shooting he did support expanding background checks only to back down under pressure from the nra. pamela brown, cnn, the white house. >> let's talk about it, joining us, a lecturer in political science at university college london. thank you for being with us. >> thank you. >> let's talk about what we just heard from the president. we have heard promises from him before. multiple gun massacres have occurred since mr. trump became president but he hasn't taken action. let's listen right here to the president, speaking at the nra convention in april of this year. here it is.