Political experts, however, say it will be hard for McCain to gather strength under the caucus system, in which voters convene in 2, 100 precinct meetings across the state to signal their preferences.
Meanwhile, on the state and local level, several developments signal a possible shift among mayors, governors and state legislatures toward energy policies that focus more on renewable fuels and conservation measures.
"For the first time since Newtown, voters sent a clear unequivocal signal, " Biden told state attorneys general gathered at the Ritz-Carlton in Washington.
According to investigators, the signal that failed in the Wenzhou crash was developed over six months, beginning in June, 2007, by the state-owned China Railway Signal and Communication Corporation.
So, what actions should Penn State take that would signal the beginnings of a turnaround?
As an affair of the state, Obama must send the signal that the days of free handouts to oil are over.
The bills signal a historic change for Democrats in a state where owning a gun is as common as owning a car in some rural areas.
Within days, the state-owned company that produced the signal box apologized for mistakes in its design.
Chinese government reports following a state-led investigation have blamed flawed signal equipment and poor communications procedures as well as corruption.
This could send a signal that, Bush v Gore notwithstanding, the justices still consider that state election disputes are not a matter for the highest court in the land.
It would be the clearest signal possible that these companies could not be trusted with the responsibility that the state wishes to pass to them.
Secretary of State Condoleezza Rice has been vague about how the United States could signal its displeasure with Moscow without ratcheting up tensions too far.
CNN: U.S. may pull nuclear deal to punish Russia, source says
The following August the fall of the Kiriyenko cabinet, and with this the abandonment of its effort to stave off financial crisis with western help, was thought to signal the end of Mr Yeltsin's role as an active head of state.
The statement is the first public signal from the government that it will take concrete steps in response to reports in state-run media, though it was unclear from the report just how it would heighten oversight of the industry.
On the bigger geo-diplomacy - driving an EU member state into the arms of the Russians and sending a big sub-textual signal to other states close to Russia - it just begins to look like the Germans cannot do geo-politics.
In becoming the first modern international tribunal to convict a head of state for international crimes committed while in office, the Special Court sent a clear signal that neither rank nor title will shield from justice those who perpetrate the most egregious of crimes.
By picking up this return signal, the radar probe's own antenna collects information about the crystal and, thus, the physical state of the tyre.
Valderlei Canuto Leandro, 32, host of the Sinal Verde (Green Signal) programme on Radio Frontera, was shot dead by unidentified assailants in the city of Tabatinga, in the state of Amazonas, according to local press reports.
While this step does not constitute US recognition of a Palestinian state in the absence of a peace treaty between the Palestinians and Israel, it certainly sends a clear signal that this is the direction the US is heading.
The presence here today of the envoy of the Quartet, Mr. Tony Blair, is a most telling signal, especially since he has been personally involved in the Palestinian Authority for many years and in the efforts for state building in Palestine.
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