If today’s general election polling holds true, Hillary Clinton will easily defeat Donald Trump.

Clinton Trump 347 191 Electoral votes Clinton Trump 347 191 Electoral votes Maps are based on current general election polling and 2012 general election results.

Current national and battleground state polls have Mr. Trump trailing Mrs. Clinton by about 10 percentage points should they face off in the general election.

If those numbers hold, Mrs. Clinton would take all of the states that President Obama won in 2012, as well as North Carolina (which he won in 2008), putting her far over the 270 electoral votes needed to win.

Mrs. Clinton currently fares worse than Mr. Obama only in New York, a state that she would win easily according to current polling.

This is how the map would look if Mr. Trump improved on his polling margin by five percentage points in each state.

Clinton Trump 285 253 Electoral votes Ohio 18 N.C. 15 Fla. 29 Clinton Trump 285 253 Electoral votes Ohio N.C. Fla.

He would win Florida, North Carolina and Ohio, but he would still lose the election.

Mr. Trump could win if he improves on his polling margin by 10 percentage points.

Clinton Trump 233 305 Electoral votes N.H. 4 Penn. Iowa 20 6 Ohio 18 Colo. Va. 9 13 N.C. 15 Fla. 29 Clinton Trump 233 305 Electoral votes N.H. Penn. Iowa Ohio Colo. Va. N.C. Fla.

In that scenario, Mr. Trump would win five additional battleground states that Mitt Romney lost in 2012, a big swing in the electoral map that would leave him with roughly 30 electoral votes to spare.

Closing large polling gaps in the time remaining is rare but certainly not unprecedented.