The battle in Congress and the sluggish economic recovery could again be the dual drivers of stocks Tuesday.
Trading this week is expected to be choppy ahead of the Oct. 1 deadline for Congress to pass a resolution to keep the government funded.
(Read more: Stocks rudderless as DC agenda dominates)
LPL chief market strategist Jeff Kleintop said the market is just beginning to react to the idea Congress may not strike a deal, forcing a partial shutdown of the government. Kleintop said that the market may have been shrugging off the threat because the last two shutdowns were not particularly negative for stocks and they were short - five days in November, 1995 and 21 days in January, 1996.