Because I have come to the conclusion that I cannot continue to campaign to uphold values of fairness, freedom and openness from within the Liberal Democrats under its current leadership.
There is nothing wrong about wanting to uphold values like gender equality and democracy, and it makes sense to do so in these kind of terms.
But the entertainment industry, which is sometimes accused of resorting to situational ethics when the box office is at stake, says it's seeking to uphold values of its own.
But he had seen moderates in the Republican Party champion civil rights and uphold values that were instilled during the party's founding, only to become the enemy of the conservative base.
Once it honored heroic individuals and upheld values that whole populations could embrace.
We must build a more inclusive society, which respects diversity while upholding values that bind us together.
Residents, who have so far been cowed by the enormous tax contributions that energy companies make to the state's coffers, are upholding values not counted in dollars.
Can today's museums really be seen as beacons for upholding values such as social justice, inclusivity and wellbeing if their internal operations tell a different story?
Despite these threats and setbacks, it remains the case that liberal democracies like the US, UK and Australia lead the way in upholding values of individual liberty.
Talking of "humility", of the environment, of upholding values, of how America had to earn respect was not only a devastating attack on what had gone before but a signal to the world that there would be meaningful change.
That included upholding values such as freedom of expression and religious tolerance, and being ready to help refugees although she said that, since the refugee crisis of 2015, "we've tightened things up".
