Joe Biden has warned the US is "rapidly coming to an end" of its ability to help Ukraine - unless Congress approves more military funding for the country. The Democrat US president made the comments amid a row with some Republicans who want to tie additional support for Kyiv with funding for tougher security measures at the US-Mexico border. President Biden issued the warning at a White House press conference on Tuesday alongside Ukrainian president Volodymyr Zelenskyy, who has travelled to Washington DC in a bid to shore up support for fresh funding. The US has already provided more than...