I think that the legislative, executive, and judicial branches are coequal branches of government. The legislative branch does not have an unconditional right to executive branch work product and the Supreme Court has never found that it has. The Speaker of the House has oversight authority over the president only in her mind.
The House has the power of impeachment. And it has the power of the purse. If they demur from using either, they’re out of ammo.
The lines seems a bit blurry at times. Who has oversight over intelligence activities?
Steve
The executive branch. The legislative branch’s only roles in foreign affairs are the Senate’s role in approving appointments or ratifying treaties, appropriating budgets for consular wages and budget and the power to declare war.