Is Elizabeth Warren running for president? Even she sounds unsure of the answer. (Photo by Steve Pope/Getty Images)

Sen. Elizabeth Warren (D-Mass.) is making one thing clear: she and Hillary Clinton aren't all that close.

"We have talked. It's not much more than that. Not much more," Warren told People of her relationship with Clinton.

Her response was, surprisingly, slightly less clear on another front: her presidential campaign plans.

Warren has repeatedly said she does not plan to run for president in 2016, a possibility Clinton is closely considering. But when asked again whether she wants to run, she told People "I don't think so."

Previously, Warren has sounded far more definitive about not running. Her office told National Journal that despite her latest comments, "nothing has changed" about her presidential plans.

Warren's midterm campaign travel to early presidential nominating states has reignited speculation she might be mulling a run after all. She was recently in Iowa to campaign for Rep. Bruce Braley's Senate campaign. And she plans to campaign for Sen. Jeanne Shaheen (D-N.H.) this weekend.

It's worth noting that Warren, along with every female Democratic senator, signed a 2013 letter to Clinton encouraging her to run for president.