President Donald Trump said this week that he would welcome data centers.

He said they bring jobs and tax money.

He spoke at the White House.

He was with cryptocurrency leaders.

But candidates in competitive midterm races do not use his message.

Voter anger about data centers is a big political issue.

The centers can be bigger than football stadiums.

They use more energy than small cities.

People worry about high electricity bills.

They worry about water use and pollution.

They worry about changes to their towns.

The Senate Republicans' campaign group warned that data center anger could cost them a seat.

In Ohio, Democrat Sherrod Brown is running attack ads.

He attacks Republican Sen. Jon Husted.

Brown calls him the "face of data centers."

A Republican memo said data centers are "the anchor hanging around Husted's neck."

Most registered voters do not want a data center near them.

A Fox News poll in July said this.

In Nevada, Democrat Aaron Ford tied Trump's statement to Republican Gov. Joe Lombardo.

Ford said he would stop new state tax breaks for data centers.

In Texas, Gov. Greg Abbott faces attacks from his Democratic challenger.

The attacks are about data center development.

Abbott promised tougher action.

But Trump criticized the change.

Trump said "I think it's a mistake."

Even some of Trump's allies use data centers for attacks.

U.S. Rep. Tom Tiffany is running for Wisconsin governor.

He released an ad.

He calls his Democratic opponent "Data Center David Crowley."

Crowley said Tiffany is lying.

Tiffany supported data center legislation in Congress.