Meanings of following bitter in English

In a manifesto, published when I was in the States, the following bitter pills for the democrats were inserted.

Then he gives utterance to the sense of indignation which filled his heart in the following bitter and contemptuous words:

The two formed a unity government in February following bitter post-election feuding and a clampdown by Mugabe's forces against the opposition.

Minna herself seems to have toyed with the idea of reconciliation, for she wrote to Praeger, who told Wagner, and received the following bitter complaint:

The Bill to provide for the holding of a referendum on abortion was passed by 23 votes to 16 following bitter exchanges.