US and India had and has never been very close friends, even during Trump tenure ,however, US president and Indian P.M stand for bromance on personal level though. Republican are known as right wing group whereas Democrates are left wing and liberals. There are some permanent national interest of US and these interests are always on priorities regardless of being a Repulican or a Democratic president. One of them is how to keep supremacy of US in South Asia particularly in Subcontinent because China is the most powerful country of the region. It's veto power also, so how to keep counter balance in the region US supports India because there is no other country in South Asia which may face China and to keep another level of counter balance US supports Pakistan against India.
Delhi has always been in good relations with Moscow to stop US from overpowering India. There is no permanent friend and enemy but permanent interest , it is a well known fact. Joe Biden, a Democrat, will have good relations with India but not with Prime Minister because of personal bromance with outgoing president of US.
On Kashmir issue, Joe Biden and Kamala Harris have vast differences with India but it does not affect Indian foreign policy or diplomatic relationship with US for both sides.