Lawmakers seek $200M for high-speed rail connecting Seattle, Portland and Vancouver

State of play: About 3-4 million additional people are expected to reside in the region by 2050, on top of the 9 million who live there already, the lawmakers wrote.

• The letter was signed by Democratic U.S. Sens. Patty Murray and Maria Cantwell, as well as the eight Democrats who represent Washington state in the U.S. House.

Details: Washington's Legislature approved $150 million last year to try to get the bullet train project off the ground, with the goal of attracting federal matching dollars.

• The additional $198 million from the federal government would help pay for the planning phase of the project, which is expected to take two to five years, per the Washington State Department of Transportation.

The other side: Republicans have argued that a bullet train isn't needed and that public money would be better spent on improving Amtrak service along the north-south corridor.

What's next: Much more funding would be needed to actually complete the high-speed rail project, which a 2017 feasibility study estimated would likely cost between $24 billion and $42 billion.