Atienza said Pacquiao would still have three weeks to campaign should he decide to run.
Pacquiao, with wife Jinky by his side, took his oath as a member of the Liberal Party-Atienza wing last Friday in simple rites before Atienza at the Manila City Hall.
Pacquiao is not yet sure if he will run for congressman or mayor in his hometown Gen. Santos City.
"I have advised him to think about this (politics) seriously. I do not see any problem if he decides to enter politics. I am sure that he would give it the same priority. But as of now, he is still discerning it if he would run as mayor or congressman in his hometown General Santos," said Atienza.
Pacquiao is set to begin his six-week training for his fight in Texas, and if he decides to run for a local electoral post, the training will overlap with the campaign period prescribed by the Commission on Elections.
But Atienza is confident that the remaining three-week campaign period after his April 21 fight would be more than sufficient for Pacquiao to make a full campaign.
"He is a known national figure, he no longer has to introduce himself to the people. He can do the campaign in two weeks."
Atienza said Pacquiao’s lack of educational attainment would not be an issue that will discredit him. There were people who have led ordinary lives yet turned out to be good public servants.
He said that there are certain qualities that a candidate must possess. The candidate must have clean and clear intentions.
"This man (Pacquiao) has loyalty and gratitude in his heart. These are qualities that are hard to find," Atienza said.