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GERMANY - AUGUST 15: German Vice Chancellor and Economy and Energy Minister Sigmar Gabriel, who is also party chairman of the German Social Democrats (SPD), tours J.D. Neuhaus, who produce pneumatically and hydraulically-operated hoists and crane systems on August 15, 2016 in Witten, Germany. Gabriel is visiting a variety of companies, projects and meeting with citizens in North Rhine-Westphalia as part of his annual summer tour. Germany faces federal elections in 2017. (Photo by Sascha Schuermann/Getty Images)

GERMANY - AUGUST 15: German Vice Chancellor and Economy and Energy Minister Sigmar Gabriel, who is also party chairman of the German Social Democrats (SPD), tours J.D. Neuhaus, who produce pneumatically and hydraulically-operated hoists and crane systems  on August 15, 2016 in Witten, Germany. 
Gabriel is visiting a variety of companies, projects and meeting with citizens in North Rhine-Westphalia as part of his annual summer tour. Germany faces federal elections in 2017. (Photo by Sascha Schuermann/Getty Images)

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GERMANY - AUGUST 15: German Vice Chancellor and Economy and Energy Minister Sigmar Gabriel, who is also party chairman of the German Social Democrats (SPD), tours J.D. Neuhaus, who produce pneumatically and hydraulically-operated hoists and crane systems on August 15, 2016 in Witten, Germany. Gabriel is visiting a variety of companies, projects and meeting with citizens in North Rhine-Westphalia as part of his annual summer tour. Germany faces federal elections in 2017. (Photo by Sascha Schuermann/Getty Images)

GERMANY - AUGUST 15: German Vice Chancellor and Economy and Energy Minister Sigmar Gabriel, who is also party chairman of the German Social Democrats (SPD), tours J.D. Neuhaus, who produce pneumatically and hydraulically-operated hoists and crane systems  on August 15, 2016 in Witten, Germany. Gabriel is visiting a variety of companies, projects and meeting with citizens in North Rhine-Westphalia as part of his annual summer tour. Germany faces federal elections in 2017. (Photo by Sascha Schuermann/Getty Images)

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GERMANY - AUGUST 15: German Vice Chancellor and Economy and Energy Minister Sigmar Gabriel, who is also party chairman of the German Social Democrats (SPD), tours J.D. Neuhaus, who produce pneumatically and hydraulically-operated hoists and crane systems on August 15, 2016 in Witten, Germany. Gabriel is visiting a variety of companies, projects and meeting with citizens in North Rhine-Westphalia as part of his annual summer tour. Germany faces federal elections in 2017. (Photo by Sascha Schuermann/Getty Images)

GERMANY - AUGUST 15: German Vice Chancellor and Economy and Energy Minister Sigmar Gabriel, who is also party chairman of the German Social Democrats (SPD), tours J.D. Neuhaus, who produce pneumatically and hydraulically-operated hoists and crane systems  on August 15, 2016 in Witten, Germany. Gabriel is visiting a variety of companies, projects and meeting with citizens in North Rhine-Westphalia as part of his annual summer tour. Germany faces federal elections in 2017. (Photo by Sascha Schuermann/Getty Images)

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GERMANY - AUGUST 15: German Vice Chancellor and Economy and Energy Minister Sigmar Gabriel, who is also party chairman of the German Social Democrats (SPD), tours J.D. Neuhaus, who produce pneumatically and hydraulically-operated hoists and crane systems on August 15, 2016 in Witten, Germany. Gabriel is visiting a variety of companies, projects and meeting with citizens in North Rhine-Westphalia as part of his annual summer tour. Germany faces federal elections in 2017. (Photo by Sascha Schuermann/Getty Images)

GERMANY - AUGUST 15: German Vice Chancellor and Economy and Energy Minister Sigmar Gabriel, who is also party chairman of the German Social Democrats (SPD), tours J.D. Neuhaus, who produce pneumatically and hydraulically-operated hoists and crane systems  on August 15, 2016 in Witten, Germany. Gabriel is visiting a variety of companies, projects and meeting with citizens in North Rhine-Westphalia as part of his annual summer tour. Germany faces federal elections in 2017. (Photo by Sascha Schuermann/Getty Images)

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GERMANY - AUGUST 15: German Vice Chancellor and Economy and Energy Minister Sigmar Gabriel, who is also party chairman of the German Social Democrats (SPD), tours J.D. Neuhaus, who produce pneumatically and hydraulically-operated hoists and crane systems on August 15, 2016 in Witten, Germany. Gabriel is visiting a variety of companies, projects and meeting with citizens in North Rhine-Westphalia as part of his annual summer tour. Germany faces federal elections in 2017. (Photo by Sascha Schuermann/Getty Images)

GERMANY - AUGUST 15: German Vice Chancellor and Economy and Energy Minister Sigmar Gabriel, who is also party chairman of the German Social Democrats (SPD), tours J.D. Neuhaus, who produce pneumatically and hydraulically-operated hoists and crane systems  on August 15, 2016 in Witten, Germany. Gabriel is visiting a variety of companies, projects and meeting with citizens in North Rhine-Westphalia as part of his annual summer tour. Germany faces federal elections in 2017. (Photo by Sascha Schuermann/Getty Images)