Those seats which are safe in the general election are precisely those that are often not safe in the primaries, however, so the threat of primary challenges is probably what is driving the disparity.
In fact, many believe primary challenges are more in the area of institutional capacity and teacher professional development, rather than in technical areas (Lopes 2003).
One of the primary challenges is the design of efficient Medium Access Control MACC) protocols that conform to various rules imposed to protect primary users as well as accommodate spatio-temporal variations of the TVWS spectrum.
Like all political efforts, primary challenges are never guaranteed.
The Democratic nominees' primary challenges are history and enthusiasm.
Especially in the south, primary challenges are generally fueled by the Evangelical wing of the party.
Most recently, it was proven when Sens. Arlen Specter (D-PA) and Michael Bennet (D-CO) strengthened their position on the public option almost immediately after primary challenges were announced against them.
Many of the primary challenges are directed at the Senate's top Republican leaders, including Senate President Stephen Morris, Senate Vice President John Vratil, Assistant Majority Leader Vicki Schmidt and key committee chairs, including Tim Owens, who runs the judiciary panel.
Our premise and design was qualitative in order to explore and generate hypotheses, and the findings suggest that four primary challenges are to be addressed to improve the continuum of HF care.
The last time Mr. Rangel faced a serious primary challenge was in 1994, when he defeated Mr. Powell, who was then a councilman, 61 percent to 33 percent.
