While vowing to ensure Donald Trump "remains comfortable" on the campaign trail, the Republican presidential nominee's new campaign manager said Thursday that voters can expect him to deliver more positive, policy-heavy speeches between now and the November election.

"We would like to take an uplifting, optimistic, policy-centric message directly to the American people," Republican pollster Kellyanne Conway, who was promoted to the managerial position on Wednesday, told CBS.

"The message has to be about substance. It has to be about issues," Conway added, noting that she is confident Trump will stick to a disciplined message.

For months, Trump has struggled to deliver his stump speeches and give interviews without straying off course. He set off two media firestorms earlier this month after suggesting, during separate campaign appearances, that "Second Amendment people" could stop Hillary Clinton from nominating liberal Supreme Court judges as president and that she and President Obama "co-founded ISIS."

But on Tuesday, Trump made a last-minute decision to scrap his usual routine at a campaign rally in Wisconsin for a scripted speech about poverty, crime and welfare reform. Conway said voters can expect similar speeches going forward.

"He's going to give these policy speeches. You'll see more of those. Next week is immigration week, followed by education week," she said in a separate interview Thursday on CNN. "We've got to get away from this content-free campaign and on to the substance."

Conway added, however, that the campaign will continue "to make sure Donald Trump is comfortable about being in his own skin — that he doesn't lose that authenticity that you simply can't buy and a pollster can't give you."

"He doesn't look at things through a political lens," she said. "It's very refreshing that Donald Trump speaks the way Americans speak."