Due to the fact that / The reason is because

Due to the fact that / The reason is because

These two phrases are both too wordy and too colloquial for formal writing. They also fail to express a simple causal relationship with efficiency. Handily, these phrases can usually be replaced by the word "because":

Instead of: "The experiment was halted due to the fact that funding was withdrawn."

Write: "The experiment was halted because funding was withdrawn."

jls164