Sen. Jeff Sessions (R-Ala.) wasted no time during his speech on the first night of the Republican convention in identifying why Donald Trump was victorious.

"This year," Sessions said, "our voters spoke clearly on two critical issues in our primaries: trade and immigration. They affirmed Donald Trump and his positions, they oppose Obamatrade, and they demand a lawful system of immigration that protects their safety and their financial well-being."

The two most important words in that statement are "our voters."

Trump's hard-right position on immigration served him well in boosting him to front-runner status in the Republican primary. But in the general, recent polling suggests that it's not as beneficial — if it's beneficial at all.

In the most recent Washington Post/ABC News poll, published Sunday, we asked voters which candidate they trusted more to handle the issue of immigration. Overall, voters were more likely to say Hillary Clinton than Trump — including pluralities of nearly every group, except Republicans and white men without college degrees.

Nonwhite voters trust Clinton by a margin of 46 points — but white voters overall trust her slightly more, too. Independent voters give Clinton the edge by nine points.

Among registered voters, Clinton has a 15-point advantage. But among all adults, the spread is wider, 21 points — and that's up substantially from May, when Clinton led on the subject by nine points.

In February, Gallup found that immigration was a much more important issue to Republican voters than to Democrats, perhaps unsurprisingly. Among members of both parties, the economy remains the top concern — and on that issue, Trump's disadvantage disappears. In our new poll, 48 percent of Americans trust Trump more, vs. 43 percent who trust Clinton.

Sessions was definitely preaching to the choir when he celebrated Trump's position on immigration to a room full of Republican delegates — to "our voters." Luckily for Trump, that's not the only song his team is singing. The utility of his hard-right stance on immigration has likely run its course.