Who is leading in US polls

The answer to the question "Who is leading in US polls" depends on the time frame, the specific polls being referenced, and the methodologies used in those polls. Here's a summary of the current polling landscape in the United States:
National polls
According to FiveThirtyEight's polling average, Democratic candidate Kamala Harris is leading Republican candidate Donald Trump by 4.7 percentage points nationally. However, this lead is within the margin of error, meaning the race is essentially tied.
Battleground state polls
Battleground states are states that are considered to be competitive in the presidential election. In these states, the race is typically much closer than in the national polls. According to RealClearPolitics' polling average, Harris has a slight lead over Trump in several key battleground states, including Pennsylvania, Michigan, and Wisconsin. However, Trump is leading in other battleground states, such as Florida and Ohio.
Methodology
It's important to note that different polls use different methodologies, which can affect the results. Some polls use random digit dialing (RDD), which involves calling landlines and cell phones. Other polls use online panels, which involve recruiting people to participate in surveys online. RDD polls are generally considered to be more accurate than online panels, but they are also more expensive to conduct.
Margins of error
All polls have a margin of error, which is the amount by which the results could vary from the true population value. The margin of error is typically +/-3 percentage points, but it can be larger or smaller depending on the size and methodology of the poll.

The current polling landscape in the United States shows that the race between Harris and Trump is close, both nationally and in the battleground states. It's still too early to say who will win the election, but the polls will continue to be closely watched in the coming weeks.