Step 1: In the 2017 Mongolian presidential elections, businessman and former judo champion Khaltmaagiin Battulga won the presidency. Step 2: Other candidates included Sainkhuugiin Ganbaatar and Miyeegombyn Enkhbold, but they lost in the run-off. Step 3: Tsakhiagiin Elbegdorj was the outgoing President who completed his term before Battulga took office.
\[
\boxed{\text{Khaltmaagiin Battulga}}
\]