House Republicans upped their pressure on 17 Democratic state attorneys general Monday who are waging a campaign against Exxon Mobil and conservative groups over climate change.

The coalition of Republicans on the House Science, Space and Technology Committee sent a round of letters to the attorneys general on Monday asking for all communication records and emails between them and climate activists. A similar letter was sent last month.

The House members want to show collaboration between the activists and states to set a political agenda, rather than an investigation based on a real legal argument.

Monday's letters were also used to demonstrate Congress' right to investigate state authorities when they believe the Constitution is being violated.

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