Angle, however warped, would be 1% of 1/2 of 1/3rd of the power apparatus in Washington. By herself she can do very little damage.
I brought this up before when somebody else said this, but a single backbench senator (Jim Bunning) was single-handedly able to hold up the payment of unemployment benefits for about a week, despite opposition from pretty much all of his colleagues, within and without his party. A single senator still retains significant (potentially harmful, as in this case) power.
On a personal note, although I'm no fan of Harry Reid, I do not want that teabagger representing me in the Senate.