Biden’s climate agenda faces yet another obstacle: Kyrsten Sinema

While the centrist senator Joe Manchin has announced his support, it is unclear whether Sinema will also back the bill

The most ambitious attempt yet to pass climate legislation in the US may have surprisingly won the crucial backing of a senator who owns a coal company. Now it faces a further, deeply ironic, obstacle - a lawmaker who was once a member of the Green party.

Last week, Joe Manchin, the centrist West Virginia senator who has been lavished by donations from the fossil fuel industry and made millions of dollars from his ownership of a coal-trading firm, stunned Washington by announcing his support for $369bn in spending to boost renewable energy and slash planet-heating emissions.