Consolidating democracy. Any populist phantoms around?

The presidential campaign has been unleashed and with it goes the traditional battle for power. This is not different from any other presidential race Chile has had since the start of democratic times with Aylwin as President in 1990. It has been 25 years of transition to the democratic game and 2 coalitions have been circling and taking posts for the Presidential seat. However, the end of a stable political cycle - with most presidential terms ruled by the center-left coalition, ex Concertación de Partidos Por la Democracia, today Nueva Mayorìa - is facing all the challenges brought about by the end of a stable cycle with the beginning of a new political era. In this new era, post-transition times, empowered middle-classes press the state to tackle disparities in the wake of 25 years of steady growth but uneven distribution of wealth. Country Risk Chile analyses the possible scenarios with three frontrunners for the Presidency, March 2018. This analysis takes into account the risk and opportunity that each candidate brings to the political landscape against the backdrop of economic slowdown, productivity issues, social change and citizen's disaffection with political parties.
What do they bring to the opportunity side and why? What is their Achilles' heel and why?