I tried checking any news outlets that reported that Elon Musk's party will make Bitcoin a legal tender and I couldn't find anyone. Anyone who trusts politicians will be disappointed. They can promise anything to gain political power. When they are elected, you will know that it was a bait to get your vote. I don't trust Trump and Elon, Bitcoin should be apolitical.
First: Elon never stated that his party would legalize bitcoin as a currency, he only confirmed that the America Party would support and accept bitcoin.
Second: changing/replacing or adding/removing a national currency is a complex issue. That is the job of Congress and the Fed, no party or president has the authority to do so. Musk is wise enough not to make such silly statements just to lose the people who believe in him.
As for trusting politicians, the issue between us and politicians is not whether to trust or not, because even if you don't trust and don't vote. They will also become president. So let's consider it's a trade between them and us, and we'll be the more passive party when we can't guarantee which politician will be less bad.