At last weekend’s NRA Convention, Ted Cruz, the first declared GOP presidential candidate, was asked about wavering public opinion in regards to gun control, and how fluctuating public opinion shapes his stance on issues.Guns.com asked Cruz: In the wake of the Sandy Hook shooting, a statistic surfaced putting support for background checks at 90%. Did you go against the want of the nation, with your vote against Manchin-Toomey? And also, how does public opinion shape your response to national problems? Sens. Manchin, a Democrat and Pat Toomey, a Republican, drafted the bill, aiming to expand background checks, following the aftermath...