MEXICO CITY (Reuters) – Mexican President-elect Claudia Sheinbaum said on Wednesday that she has no plans to increase taxes for the general population but that her administration would continue to invest in major infrastructure projects and increase the minimum wage.

Sheinbaum, who will take office in October after winning a landslide election victory earlier this month, also guaranteed to maintain social welfare programmes expanded under her predecessor and mentor President Andres Manuel Lopez Obrador.

"Without deep fiscal reforms one can, with current income, reorientate (government spending) to where it is needed," Sheinbaum told reporters.

The peso extended losses on Sheinbaum's comments, trading down 1.3 per cent against the dollar. Mexico's currency has been hit hard since Sheinbaum, and her ruling Morena party, scored a huge election win on June 2.

That win has given the ruling party's coalition a super-majority in the lower house and close to one in the Senate, putting it in a strong position to push through constitutional reforms.

Markets are especially concerned about a judicial reform proposed by Lopez Obrador, which would see judges elected by popular vote. Critics warn this could remove vital checks and balances on the president and lead to the political capture of the judiciary.

Mexico's incoming president also said she thought the planned review in 2026 of the United States-Mexico-Canada Agreement (USMCA) will be "minor".

The review is seen as a major test for Sheinbaum's government and a particular risk for Mexico if former President Donald Trump wins the US election in November.