Senate Minority Leader Mitch McConnell threatened to block a bipartisan infrastructure package on Tuesday if Democrats cut off debate on amendments too quickly.

The Kentucky Republican’s warning comes in response to a plan by Democrats to wrap up the $1.2 trillion measure this week. Democrats plan a Thursday vote to end debate on carefully negotiated legislation and to pass it before leaving town for the Friday funeral of former Sen. Mike Enzi of Wyoming, who died following a bicycle accident last week.