Amaravati, June 20: The news is good one for the BJP but it is equally bad for the Telugu Desam Party (TDP). Four out of six Rajya Sabha Members of Parliament have just joined the BJP. TDP’s S Chowdary, CM Ramesh, TG Venkatesh, today formally joined the BJP in presence of party’s working president J. P. Nadda. Another TDP MP will formally join later as he is unwell now.