Flip-Flop Quotes
When Donald Trump was running for the presidency as the Republican nominee, a large proportion of the party stalwarts were very unhappy with Trump's often extreme positions, which not only offended them put turned off most voters. After much negotiating the Republican leaders thought that they has an agreement whereby trump would pivot on the most egregious and unpopular positions. However many Republican leaders like Flake were not happy with Trump's pivoting technique.
In politics, a person who flip flops is suspected of not having principles. In science, a person who does not flop flop is suspected of not being scientific. As new evidence amasses, the scientific method requires that the scientist chenges. The politician is often expected to hold to his principles regardless of new or contrary evidence.