HELP - How these US elections "points lead" is calculated?

[Hitman]

is it something like desi survey companies goes to the street and get the surveys done? 

[Mancode]

no, whoever gives bigger brief case will be declared winner in polls

US polls/surveys are much worse than indian polls

majority polls always favours democrats , in 2016 many polls said hillary clinton will win, projected 3-4 points lead, but trump won and similar in 2020 biden was favoured 10 points he actually won by good competition from trump, this time they are saying kamla neck and neck, result: trump will win landslide or trump will win comfortably

[Hitman]

8 minutes ago, Mancode said:

no, whoever gives bigger brief case will be declared winner in polls

US polls/surveys are much worse than indian polls

majority polls always favours democrats , in 2016 many polls said hillary clinton will win, projected 3-4 points lead, but trump won and similar in 2020 biden was favoured 10 points he actually won by good competition from trump, this time they are saying kamla neck and neck, result: trump will win landslide or trump will win comfortably

so it is like "Oora Mastan" survey? 

But, where/how is this data collected from ? 

[no01]

8 minutes ago, Mancode said:

no, whoever gives bigger brief case will be declared winner in polls

US polls/surveys are much worse than indian polls

majority polls always favours democrats , in 2016 many polls said hillary clinton will win, projected 3-4 points lead, but trump won and similar in 2020 biden was favoured 10 points he actually won by good competition from trump, this time they are saying kamla neck and neck, result: trump will win landslide or trump will win comfortably

exactly, vere thread lo I responded similarly. Dems ki ee poll surveys in swing states lo 7+ point lead untene close win avtharu....even 5 point lead unna doubt ey.....ade Rep's ki 1 point lead unna its almost confirmed they will win

[lollilolli2020]

12 minutes ago, no01 said:

exactly, vere thread lo I responded similarly. Dems ki ee poll surveys in swing states lo 7+ point lead untene close win avtharu....even 5 point lead unna doubt ey.....ade Rep's ki 1 point lead unna its almost confirmed they will win

obama time lo ela vunde polls and leads ?? 

obama just swing states gelichi president ayyada ?? 
 

[Pavanonline]

43 minutes ago, Hitman said:

is it something like desi survey companies goes to the street and get the surveys done? 

yeah pretty much but on phone and online. it is pretty complex on how many you poll, which area, weightage if each party and even the kind of questions you ask. so if you want to cook the numbers you can. But average of polls from RCP or 538 come close to actual result. RCP is better than 538 based on past.