Many top governmental positions (like Cabinet members and Supreme Court justices) are appointed by the President. However, the Senate must approve these nominations by a 2/3 majority vote.A president...
It is not just the Senate that has power over the President, but Congress as a whole. Congress, which is consisted of the Senate and House of Representatives is part of a system known as "Checks and...
Yes, the senate does have the power of advice and consent on presidential appointments and treaties. Read Section 2, Article II of the Constitution of the United States of America.