Where the presidential race stands one month from Iowa

The Iowa caucuses are just under a month away, and the 2016 presidential candidates are gearing up for the first voting contest. As "Face the Nation" anchor John Dickerson explains, campaigns are at the point where every single decision counts leading up to February 1st.

On Monday, Republican front runner Donald Trump released an ad "about fear and walls," as Dickerson characterized it. And former president Bill Clinton hit the campaign trail for his wife and Democratic lead Hillary Clinton for the first time.

"On the Republican side, the race is a battle between Trump and everyone else," said Dickerson. But there are alternatives like grassroots candidate Ted Cruz or mainstream favorite Marco Rubio.

In the Democratic race, "establishment support is not split," according to Dickerson. Hillary Clinton is the only stable front runner.

Watch the video above to learn more about where the race for the White House stands.