Sen. Bernie Sanders (I-Vermont) will campaign for his former opponent in Colorado Saturday, Hillary Clinton’s campaign announced.

His rally is scheduled for Saturday afternoon in Colorado Springs. According to Clinton’s campaign, Sanders will talk about the Democratic presidential nominee’s economic plans and emphasize the need to defeat her GOP opponent, Donald Trump.

The campaign expects to release more specific details about the event soon.

With days left until the election, Clinton’s campaign is ramping up its efforts to court voters in the Centennial State by buying more TV ad space and holding rallies.

Former President Bill Clinton is slated to appear at three Colorado events on Friday.

One poll shows Clinton and Trump in a dead heat in Colorado, while another shows her with a comfortable six-point lead.

Trump’s campaign also narrowed in on Colorado, sending Dr. Ben Carson to three campaign events on Friday.

His running mate, Indiana Gov. Mike Pence, has also appeared in Colorado in recent days.