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A Labour spokesman acknowledged the elections would be "tough", claiming local polls are "always challenging for incumbent governments and these council elections are in Tory heartlands".

"Net zero is the economic opportunity of the 21st century, one that has the potential to reignite our industrial heartlands, create good jobs for the future and lower bills in the long term."

Now predominantly Muslim, North Africa was once a Christian heartland, producing Catholic popes who left their mark on the Church to this day.

Three other hydrogen hubs in Republican-leaning red states and regions — Texas, Appalachia and a “heartland” hub in Minnesota, North Dakota and South Dakota — are safe, the list shows.

If Trump continues to inflict pain on constituents in the GOP heartland, more lawmakers might break with him.