Washington (AFP) – US lawmakers scrambled Wednesday to cut a deal on more Covid-19 funding as President Joe Biden and Democratic leaders in Congress urged the nation not to drop their guard in combating the pandemic. The White House has been ramping up its warnings in recent weeks that money is running out for crucial elements of the federal response — including vaccination, testing and providing therapeutic medicines. Officials said last week the federal government would no longer be able to pay hospitals and health clinics for the testing they provide for 30 million uninsured Americans. Mit…