Signs point to Russian invasion of Ukraine in days or even hours. But “notional” Biden-Putin summit also surfaces.

Russia appeared to continue preparations to invade Ukraine Sunday, blaming renewed conflict in the eastern portion of that country on “provocations of the Ukrainian security forces” and moving tens of thousands of Russian troops into what appeared to be combat formations. Meanwhile, US President Joe Biden met with the National Security Council, just days after announcing that US intelligence had convinced him Russian President Vladimir Putin had ordered an invasion of Ukraine.