From Sea to Shining Sea
Apparently Nancy Pelosi used this phrase last night. This phrase has interesting associations for Canadians, because if you look at Canada's coat of Arms

you can see the phrase "A Mari Usque Ad Mare", which means from "sea to sea." This comes from the Psalm 72:8: "He shall have dominion from sea to sea," and this is where the term "Dominion came from, back in the days when Canada and several other post-colonial nations were refered to as Dominions.
Unfortunately, Pelosi's use of the phrase is probably not a secret message to Parliament that the Americans have realised what a error 1776 was and they want us to send our soldier down to annex them. The odds favour that it is a reference to AMERICA THE BEAUTIFUL by Katharine Lee Bates.
Oh beautiful, for spacious skies,
For amber waves of grain,
For purple mountain majesties
Above the fruited plain!
America! America! God shed his grace on thee,
And crown thy good with brotherhood, from sea to shining sea.
Oh beautiful, for pilgrims' feet
Whose stern, impassioned stress
A thoroughfare for freedom beat
Across the wilderness!
America! America! God mend thine ev'ry flaw;
Confirm thy soul in self control, thy liberty in law!
Oh beautiful, for heroes proved
In liberating strife,
Who more than self their country loved
And mercy more than life!
America! America! May God thy gold refine,
'Til all success be nobleness, and ev'ry gain divine!
Oh beautiful, for patriot's dream
That sees, beyond the years,
Thine alabaster cities gleam
Undimmed by human tears!
America! America! God shed his grace on thee,
And crown thy good with brotherhood, from sea to shining sea!
[Added later: I've always prefered this song to Francis Scott Key's CALL THAT A ROCKET BARRAGE? I'VE GOT A BIGGER ROCKET BARRAGE! IN! MY! PANTS! (Crotch pointing optional) because ATB can actually be sung by humans without every dog within six blocks howling and also because I like the forward looking element of the song; it's about what the US has but also what it could have.
Notice how I don't mention any anthem from Canada. That's because as a rule, Canadian attempts at this art form are usually whiny and nasal, and their lyrics involve standing still more often than one might expect from an assortment of songs.
I do like ODE TO NEWFOUNDLAND but of course, Newfoundland was once an independent nation.]