Philippine’s Vice-President Leni Robredo on Monday resigned from her cabinet post citing “major differences in principles and values” with controversial President Rodrigo Duterte and alleged that there was a “plot to remove her from her role as vice-president”.

Her decision to quit as housing secretary follows the uproar created by Duterte’s decision to permit the burial of deceased dictator Ferninand Marcos’ remains in the country’s “heroes’ cemetary” and his contentious campaign against drug-trafficking.

She said a text message from Cabinet Secretary Leoncio Evasco Jr about the president’s order “to desist from attending all cabinet meetings,” was the last straw. Evasco had said, “There is no point for her to attend cabinet meetings if her position is always contradictory to the president’s,” local Rappler news portal reported.

Robredo, a prominent human rights lawyer, said the president had made it impossible for her to do her work. “Remaining in your cabinet has become untenable,” her letter said. In a letter to Duterte, Robredo said she will continue in her capacity as vice-president. “I will not allow the vice-presidency to be stolen. I will not allow the will of the people to be thwarted.”

Robredo also stated that the divisive leader’s proposal to reimpose capital punishment and his “sexual attacks against women” were other reasons for her decision. Her decision comes withing a week of historical commission’s chief Maria Serena Diokno resignation, who quit in protest of Duterte’s decision on the dictator’s burial.

The elections for the country’s president and vice-president are conducted separately and very often candidates from rival political parties are elected, as is the case with the incumbents, The Guardian reported.

His anti-drug campaign, which he started after taking charge as president in July this year, has reportedly left more than 3,000 suspected drug dealers and users dead.