Donald Trump's campaign will announce its biggest ad buy to date Monday, launching its newest TV spot in nine states at a price tag of about $10 million over the next week. 

The ad highlights the GOP nominee's economic message, contrasting the "two Americas" envisioned by Hillary Clinton and Trump. 

The campaign had previously aired ads in Ohio, Pennsylvania, North Carolina and Florida. The new buy also expands to New Hampshire, Iowa, Nevada, Virginia and Colorado. 

Clinton has vastly outspent Trump on the airwaves to date. As of last week, Clinton had spent $68 million compared to just $4 million for Trump.