KEY POINTS
  • Republican Judd Gregg says the lack of reconciliation rules gives power to the Senate minority.
  • Senate Minority Leader Chuck Schumer "really controls the play of the field now," Gregg says.
  • Republicans are about to hold only a 51-49 majority going into the 2018 midterm elections.

Republicans hold a razor-thin majority in the Senate as the body moves into the 2018 session. But a Republican former senator says one Democrat holds nearly all the legislative power: Minority Leader Chuck Schumer.

"Chuck really controls the play of the field now," former Sen. Judd Gregg, R-N.H., said Tuesday on CNBC's "Squawk Box." "What issues he's willing to be bipartisan on will determine whether there is legislation."