A small groundswell is rising in Congress for a faster start on the heavy-lift launch vehicle President Barack Obama says he wants, but it may be swamped by the backwash from growing irritation over NASA’s sluggish production of justification for its “game-changing” new approach. A bipartisan gang of 62 House members wants Obama to initiate “the immediate development and production of a heavy-lift launch vehicle that, in conjunction with the Orion crew exploration vehicle, may be used for either lunar or deep-space exploration.” Their June 22 letter to Obama, circulated by Rep. Frank Wolf (R-Va.), follows word from Sen. Bill...