Singh told reporters here that "he will be going to Delhi on Thursday and will discuss the matter with Rahul this week".
Earlier, the expansion was expected to take place this week but since Rahul was abroad, the Chief Minister had not been able to discuss the matter with him.
After steering the party to a stupendous victory, Amarinder Singh took oath as Punjab Chief Minister on March 16.
Amarinder was sworn in as the state's 26th chief minister along with nine ministers. He can induct nine more ministers in his cabinet.
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