In general, one should take great care with one’s time on the holy Shabbos to use it for Torah study, and not to turn to turn to foolish matters, G–d forbid. Even during the weekdays one should be careful to avoid this, but to a far greater extent on the holy Shabbos, for the day is holy, dedicated for Hashem our G–d. It was granted to the Jewish people so that they be satiated with and enjoy His goodness. Going for a stroll on the holy Shabbos is completely undesirable. We do not find that anything was permitted on this day other than sleeping a bit more than every day, and enjoying the day through [additional] food and drink.Shabbos is an immensely holy time. Of course one should be happy and enjoy the day, but this happiness and pleasure should be permeated with a sense of deep reverence and love of Hashem that extends to everything one does on this day.
However, this is provided that one’s intention is to honor the Shabbos. This means that one should feel that this is being done for the honor of Shabbos, and the Shabbos is not a day of rest of Shabbos, i.e., a sense of submission to Shabbos, should rest upon the person. ... However, idling away the time on Shabbos with foolish matters, G–d forbid, is a great sin, may G–d save us. It is especially objectionable to go for a stroll on Shabbos, for then everyone goes for a stroll, [and one will inevitably see women while strolling], and one will not emerge clean from evil, G–d forbid.Kuntres Etz Chayim, p. 53.
Thus, Shabbos is not a day of rest in the way it is normally understood—a time to take life easy. Indeed, it is a time when one can relax in the sense that he is exempted from his mundane worries. However, the purpose of this exemption is to free up time so that one can devote himself to spiritual pursuits. Shabbos is a day in which one should exert strenuous effort—if anything, even more effort than during the week—but in Tefillah and Torah study.
With this in light, the idea of spending one’s time on Shabbos discussing politics (whether community, state, or federal), current events, or the like, becomes completely repugnant. What a desecration and disgrace it is to indulge in such talk on Shabbos.
Let us go on a Shabbos campaign—a campaign not just to keep the technical laws of Shabbos (which is also necessary), but also to live with the spirit of Shabbos.