New Delhi, Aug 13 (ANI): Ruling out any alliance with Samajwadi Party in Uttar Pradesh and outrightly rejecting Lalu Prasad's proposal for a joint front against BJP in the state, BSP chief Mayawati on Wednesday said that SP chief Mulyam Singh Yadav only believes in politics of opportunism and is only interested in power. Accusing SP of being hand in glove with BJP, Mayawati announced that BSP will contest assembly elections in UP on its own.