Cucurbits are monoecious; there are separate male and female blossoms on the same plant. The male flowers tend to open first, followed by the female flowers. It is only when both the male and female flowers are open that pollination can occur.
There is nowhere in the Constitution that says that the Congress can subpoena the President of the U.S. or his people. Congress does however have general subpoena powers, but they are not absolutely clear. There are Supreme Court cases that speak to this. They generally limit this to national security type of issues.
Congress can simply not introduce the bill, or vote against it if it is introduced. BOTH the House and Senate MUST pass a bill before the President can do any thing. Even if either the House or Senate refuses to introduce or pass a bill, it cannot become law. The President has no power to legislate on his own.