political news taeshlgsd and an old pro making his move again. Former president bill Clinton blazing his way back onto the campaign trail. Why? And what does it say about former secretary Hillary... See More
political news taeshlgsd and an old pro making his move again. Former president bill Clinton blazing his way back onto the campaign trail. Why? And what does it say about former secretary Hillary Clinton and the fwhous 2016? ABC's Jeff Zeleny spent the day watching the man a lot of people have called the big dog, back in action. Reporter: Bill Clinton is back. Look, I love Kentucky. You've been good to me. Reporter: Plunging into one of the biggest political batters of the year. The effort to knock off the top republican in the senate, Mitch Mcconnell. Clinton says he's turned grid lock into an art form. When there's a problem, do everything you can to make sure the problem is never fixed. It might work in election, get people all torn up, upset, everybody mad all the time. But it's a dumb way to run a country. Reporter: In Kentucky today, Clinton was helping Mcconnell's opponent, secretary of state Alison under green Grimes. Here she is, only 14, presenting roses to the Clintons at their inauguration in 1993. Surrounded by senators in Washington, Mcconnell brushed off Clinton's visit. Every time he's come, it's been really good for me. Reporter: Perhaps. But this year, bill Clinton is his party's biggest draw. Fueled by nose zwral for the past and a hope that Hillary Clinton runs for the white house. One person not mentioned today -- president Obama. You didn't mention president Obama once in your speech today. Why is president Clinton such a bigger draw? Well, for me, president Clinton is a friend, a mentor and an adviser. Reporter: We caught up with Clinton and asked if democrats could maintain control of the senate. I think so. I do think so. They're going have to work for it, though. Reporter: Bill Clinton in high demand, hoping to ride to the rescue. Jeff Zeleny, ABC news, Louisville, Kentucky.
This transcript has been automatically generated and may not be 100% accurate.