diff --git a/src/components/XPixel.tsx b/src/components/XPixel.tsx
index 9391f5f..f024755 100644
--- a/src/components/XPixel.tsx
+++ b/src/components/XPixel.tsx
@@ -18,6 +18,19 @@ import { Suspense, useEffect, useRef } from "react";
 
 const X_PIXEL_ID = "re2t6";
 
+/* Conversion events configured in the X Ads UI, keyed by what they mean here.
+   Reported with twq('event', <event id>, {...}); the call queues if uwt.js
+   hasn't loaded yet, and is a no-op in dev where the tag never loads. */
+const X_EVENTS = {
+  pledgedToVote: "tw-re2t6-rekr4",
+} as const;
+
+/** Report an X conversion. `email` is optional and used by X for identity
+    matching — uwt.js hashes it before it leaves the browser. */
+export function trackXEvent(event: keyof typeof X_EVENTS, email?: string) {
+  window.twq?.("event", X_EVENTS[event], { email_address: email ?? null });
+}
+
 declare global {
   interface Window {
     twq?: (...args: unknown[]) => void;
diff --git a/src/components/elections/PledgeButton.tsx b/src/components/elections/PledgeButton.tsx
index 0be9d90..cc944c6 100644
--- a/src/components/elections/PledgeButton.tsx
+++ b/src/components/elections/PledgeButton.tsx
@@ -8,6 +8,7 @@ import { Button } from "@/components/ui/button";
 import { hubspotPageContext } from "@/lib/hubspot-context";
 import { pledgeSharePath } from "@/lib/elections/pledge-share";
 import { DEFAULT_ELECTION_SLUG, getElection } from "@/lib/elections/registry";
+import { trackXEvent } from "@/components/XPixel";
 
 /* "Pledge to vote" CTA — opens the same modal treatment as the navbar
    Subscribe button. Submitting records the pledge (via /api/elections/pledge
@@ -108,6 +109,7 @@ export function PledgeButton({
       }
 
       posthog.capture("pledged_to_vote", { source, election: config.slug });
+      trackXEvent("pledgedToVote", email);
       // keep the button disabled while we navigate to the shared page;
       // prefer the server's record (canonical name + unguessable token)
       router.push(pledgeSharePath(config, data.name || name, data.shareToken));