WASHINGTON — Democratic presidential nominee Hillary Clinton will deliver what aides are billing as a major economic speech on Thursday in Detroit.

The location of Clinton's speech had not yet been disclosed.

Clinton's appearance is set to follow a speech planned by Republican rival Donald Trump on what he would do to improve economic growth. Trump's speech is set for Monday at Cobo Center in Detroit.

The dueling Detroit addresses come as new polls show Clinton gaining ground on economic issues.

Aides say Clinton will outline her economic plans and argue that Trump is only focused on the wealthiest Americans.

At campaign events last week, Clinton questioned Trump's commitment to creating American jobs by highlighting his use of outsourcing at his companies.

Trump's populist economic message includes a vow to revive manufacturing jobs and renegotiate trade deals to benefit American workers.