Mercury square Uranus (orb 1.5°) creates concrete friction between the two planets. The orb is very tight; this describes a stable character pattern more than a passing reaction.
Here, Mercury in Leo in House 11 brings intellect, language, thought, and technique into House 11 (networks, audience, groups, ideas, ideologies, political beliefs, and collective projects), with Leo style (presence, pride, creation, and the wish to be seen); Uranus in Taurus in House 8 brings disruption, independence, and change into House 8 (sexuality, shared power, crisis, and invisible bonds), with Taurus style (nature, good food, physical sensuality, roots, resources, and perseverance).
Concrete friction: this aspect creates tension between thought, nervousness, rupture, and contradiction: the mind can cut too fast, provoke, or refuse the frame. House 11 (networks, audience, groups, ideas, ideologies, political beliefs, and collective projects) is in friction with House 8 (sexuality, shared power, crisis, and invisible bonds); this can create blockage, inhibition, overreaction, or repeated conflict between the two fields.