The speaker is asked how the peace walkers keep going on their long journey from San Francisco to Moscow. He says their message is "too beautiful" to fit into a poem, and he sums it up with a cheerful "GOOD NEWS!" Then he shifts to a metaphor: a pregnant woman crossing a small playground.
He describes her with warm, close detail: the veins like "blue hyacinth petals or berry scratches," the peppermint-striped blouse, the heavy steps in the sun. She isn't famous or part of any march, yet the speaker sees her effort as equal to theirs. If she makes it across, she will have taken as many steps as the walkers, "down the same road."
The mood is gentle, admiring, and a little playful. The poem suggests that ordinary, everyday perseverance, and the hope carried inside her, matters as much as a grand public gesture.