Union Pacific CEO Jim Vena says he is "99.99%" confident the Surface Transportation Board will approve the railroad's proposed $85 billion acquisition of Norfolk Southern, a deal that would fold roughly 50,000 miles of track into a single transcontinental network.

Speaking on Fox Business News on Oct. 6, Vena defended the transaction against mounting opposition from labor unions, agricultural groups and competing railroads. Asked how certain he was of approval, he conceded only a sliver of doubt.

"You always have to have a little bit of doubt, but I'm 99.99%," Vena said.

What does the merger promise shippers?

Vena said combining the Union Pacific (NYSE: UNP) and Norfolk Southern (NYSE: NSC) networks would save customers 24 to 48 hours by eliminating interchange delays on freight moving between the western and eastern United States. That time saving is the deal's central commercial pitch to shippers.

The railroads argue the combination would let them compete more effectively with trucking through lower prices and greater efficiency — a direct play for freight currently moving over the highway on transcontinental lanes.

For shippers and forwarders routing intermodal boxes coast to coast, the removal of interchange handoffs would compress transit times on lanes that today require a car swap between western and eastern carriers. Carriers competing against the merged network would face a rival with single-line service across roughly 50,000 route miles.

Why are opponents pushing back?

The Stop the Rail Merger Coalition, a group of shippers, told the Trump administration in an August letter that the combination would place nearly half of the nation's rail traffic under one company's control. The coalition warned of harm to:

• Farmers
• Manufacturers
• Energy producers
• Railroad workers

It also flagged higher consumer costs and risks to supply chains if the deal closes. Competing railroads have argued the merged company would hold near-monopoly power in rail transportation.

Vena framed the opposition as evidence the merger threatens rivals rather than the market. "In the business world, if they thought we were doing something illogical and it made no sense, they would just stay quiet … and let us fail, but we're not failing," he said. "That's what they're worried about. We're gonna have a better product, lower price, more capability to move and win in the marketplace."

What happens next?

The transaction remains subject to approval by the STB, and Vena acknowledged the regulator's timeline will test everyone's patience. A final decision is expected in 2027.

"We know that the process through the STB, even though it's … crazy long, they'll get to the right decision," Vena said. "And the right decision is, you have to do what's better for the country and more opportunity to move ahead and not look backwards."

President Donald Trump initially expressed support for the transaction, a political tailwind the applicants will look to sustain through a review period that could stretch well beyond two years. Shippers on transcontinental lanes now face a long window in which pricing, service commitments and routing options could shift materially in either direction, depending on how the STB rules in 2027.