AFP - After 18 months of arduous negotiations and a marathon night of debate, the US Senate on Sunday passed Joe Biden’s ambitious climate, tax and health care plan -- a significant victory for the president ahead of crucial midterm elections.

Voting as a unified bloc and with the tie-breaking vote cast by Vice President Kamala Harris, Democrats approved the $430 billion spending plan, which will go to the House of Representatives next week, where it is expected to pass before being signed into law by Biden.

The plan, crafted in sensitive talks with members on the right wing of his Democratic Party, would include the biggest US investment ever on climate -- $370 billion aimed at effecting a 40 percent drop in greenhouse gas emissions by 2030.

That would give Biden a clear victory on one of his top agenda items and go some way toward restoring US leadership in meeting the global climate challenge.