American Defence Secretary Lloyd Austin warned that “Ukraine’s survival” is in danger from Vladimir Putin’s invasion as he piled pressure on Republicans to stop blocking a huge new aid package.Republican House of Representatives Speaker Mike Johnson has so far refused to call a vote on a bill that would provide $60 billion (£47 billion) more for Ukraine and the White House has been scrambling to find ways to send assistance to Kyiv, which has been battling Russian forces for more than two years.