LyrArc Article Gist
The 2018 election in Mexico brings to power a party called The Movement for National Regeneration or Morena created in 2014 by Manuel Lopez Obrador, after he left the PRD. Obrador ran on the PRD ticket for president in the last two elections. Obrador won with 53% of the vote, about 30% above the vote gained by the next leading rival. 

Elections for the lower house of parliament showed a steep drop from 204 seats to 45 seats for the PRI party which was in power under president Nieto. The next leading party PAN which ran the government before the Nieto term in office, and the centre left PRD, were badly weakened. PRD now has 21 members in lower house of parliament compared to 53 before.

So deep were losses for the opposition parties such as PRI and PAN which alternately ran the government, and particularly the PRI which dominated Mexican politics since 1950, that experts see Mr. Obrador as replacing the PRI's dominance of politics with the centre left Morena. Morena's rise is a result of work at the grass roots level in Mexico just when the PRI was discredited for corruption and failure to maintain the rule of law. PRI candidate for president Antonio Meade was a U.S. trained former finance, foreign and social development minister who lacks grass roots activism support base.