To which Zimmerman petition will President Obama respond? One petition, which was posted first, requests that Attorney General Eric Holder "prosecute George Zimmerman for violating Trayvon Martin's most fundamental of civil rights — the right to life — when he shot and killed Trayvon Martin."

The other petition, posted later the same day, requests the Department of Justice stop investigating Zimmerman and "allow the American Justice system and due process to stand. No double jeopardy for George Zimmerman." The petition then cites the Fifth Amendment.

The petitions appear on the White House petitions website, which is designed to allow any American to make a request directly to the president in the hopes of getting a response. Critics claim it is nothing more than a meaningless gesture toward accountability.

The White House can respond to petitions before they reach the 100,000-vote threshold necessary to garner an official response. With Holder's speech Monday saying he would press for a federal investigation into the case, it's clear which petition the White House prefers.

The petition requesting a civil rights prosecution already had more than 3,500 signatures late Monday, while the petition against double jeopardy counted 470.