ST. PAUL — Gov. Mark Dayton says time has run out for a special legislative session.

Dayton wrote to House Speaker Kurt Daudt on Friday to say there is too little time before the November election for Democrats and Republicans to resolve their differences.

Both sides had hoped for a broad agreement that would permit a special session to pass a tax relief package and open the way for $1 billion in public construction projects. But a proposed light-rail line to the southwest Minneapolis suburbs — backed by Democrats and opposed by Republicans — has been the obstacle.

Daudt issued a statement saying Dayton and other Democrats are walking away from things that would be good for Minnesota, including the tax relief plan and highway and other infrastructure projects.