NPR's Anne Garrels reports from Moscow that as President Clinton flies to Moscow for a summit with President Boris Yeltsin, Russia's political and economic crisis is deepening. The lower house of parliament, or Duma, resoundingly rejected Yeltsin's nomination of Viktor Chernomyrdin as prime minister. Yeltsin promptly re-submitted the nomination, but it was not immediately clear when the Duma would vote again. The lawmakers have a week to consider the appointment. Meanwhile, nothing is being done to halt the slide of the ruble and the collapse of Russia's banking industry.