About 6 in 10 Americans do say the wall would at least slightly decrease the number of people entering the U.S. illegally, though only 3 in 10 think the number would significantly decrease. Yet just 35 percent of Americans believe the wall would make the country safer, while a majority of Americans — 57 percent— believe it would make no difference to safety in the U.S. Only 21 percent believe the wall would significantly reduce the availability of illegal drugs in the nation, though 28 percent say access to illegal drugs would be slightly reduced; 49 percent say the wall would have no effect.