Complex sentence: However Korolev reasoned that once the Soviets lost their leadership in space, the capricious Khrushchev would likely cut off the funding for his programs, so he continued to work--now even more intensely than before.
Split into simpler sentences: However Korolev reasoned that once the Soviets lost their leadership in space, the capricious Khrushchev would likely cut off the funding for his programs. So he continued to work-now even more intensely than before.