The 2016 presidential election is in less than two years, so the Sunday shows seem to have no choice but to ask everyone who is anyone about their future political ambitions.

"I am not running for president," Sen. Elizabeth Warren (D-Mass.), pictured walking toward the Senate chamber recently, said on CBS's "Face the Nation." (Alex Wong/Getty Images)

On CBS' "Face the Nation," Bob Schieffer asked Sen. Elizabeth Warren (D-Mass.) about whether she would run.

"You're two years into your term now, you have written a book — that's exactly what Barack Obama did two years into his Senate term," Scheiffer said. "But you've also said about 19 times that you are not running for president. So I'm going to give you a chance to say, for the 20th time..."

Warren interrupted him. "I am not running for president."

He then asked about whether she would rethink running if former secretary of state Hillary Rodham Clinton did not run. Warren smartly turned her response into a plug for her book "A Fighting Chance."

"You know, I am not running for president, but let me say something about that book, because it's important," she said." This is my 10th book, not my first or second. This book is about my life's work."

Schieffer then asked whether Warren would endorse Clinton.

"We're not there," she said. "This is about the issues on the table right now. We've got to talk about student loans, we've got to talk about minimum wage, we have got to make changes, and we have an election coming up in 2014 where those issues are going to be right on the table."

On ABC's "This Week," Sen. Marco Rubio (R-Fla.) was asked about 2016, too. He said he thought that he was ready to be president — but that so were a lot of other Republican politicians. "I mean, I’ll be 43 this month, but the other thing that perhaps people don’t realize — I’ve served now in public office for the better part of 14 years," he said. "Most importantly, I think a president has to have a clear vision of where the country needs to go and clear ideas about how to get it there, and I think we’re very blessed in our party to have a number of people that fit that criteria.”

On CNN's "State of the Union," former Republican presidential candidate Rick Santorum discussed with Candy Crowley who he thought would be a good contender in 2016 — a field that included himself.

"I'm looking for candidates who connect with average voters," he said Sunday morning. "Someone who has a heart and an understanding of those difficult times those voters are going through, and whether it's Rick Santorum or somebody else, it's someone who has that appeal and connection."

He also talked about how his new book, "Blue Collar Conservatives," fits into his thoughts about running again. "I put this book out there because I'm looking at it — whether other people join in," Santorum told Crowley. "I hope they do."

Santorum also discussed how the current legislative fight over minimum wage affects Republicans' standing with working-class Americans. He doesn't support President Obama's proposed increase to $10.10, but he said Republicans "need to be reasonable about it and offer an alternative." He said increasing the minimum wage incrementally, not according to inflation — on CNN he proposed raising it by a dollar — is the smarter move politically. Last week, Santorum's former presidential rival Mitt Romney said on MSNBC that he supported raising the minimum wage: "I part company with many of the conservatives in my party on the issue of the minimum wage. I think we ought to raise it." Like Santorum, he thought the minimum wage was a crucial part of helping the party appeal to a wider range of voters. Unlike Santorum, however, Romney said he was not thinking about a presidential campaign reprise.

Even former defense secretary RobertM. Gates was asked about 2016. Schieffer asked him, "Have you ever thought of running for president?"

"Absolutely not," Gates responded. "Two words: instant divorce."