\begin{table}[htbp] 
\centering 
\caption{\bf Within-Pool Comparisons: Predicting Probability of Winning Primary or General Election from Ideology} 
\label{tbl_appendix_lpm_win_prim_genl_33} 
\begin{tabular}{lcccccc} 
\toprule\toprule 
& \multicolumn{3}{c}{Democrats} & \multicolumn{3}{c}{~Republicans} \\ [.05in] 
Sample                 & Coeff.  & Std. Error  &  \# Obs.  & ~~Coeff.  &  Std. Error  &  \# Obs.  \\ [.01in] 
\midrule 
\multicolumn{7}{l}{\textit{Primary Election Winners vs. Others in Pool}} \\ [0.01in] 
All pools              & -0.022 & (0.019) & [2379] & ~~0.077 & (0.019) & [3488] \\ [.01in] 
Safe districts         & -0.058 & (0.025) & [832] & ~~0.098 & (0.029) & [1675] \\ [.01in] 
Competitive districts  & 0.011 & (0.030) & [930] & ~~0.069 & (0.029) & [1570] \\ [.01in] 
\midrule 
\multicolumn{7}{l}{\textit{General Election Winners vs. Others in Pool}} \\ [0.01in] 
All pools              & -0.034 & (0.024) & [1184] & ~~0.090 & (0.027) & [1921] \\ [.01in] 
Safe districts         & -0.061 & (0.027) & [806] & ~~0.095 & (0.033) & [1218] \\ [.01in] 
Competitive districts  & 0.017 & (0.060) & [324] & ~~0.080 & (0.044) & [697] \\ [.01in] 
\bottomrule 
\end{tabular} 
\end{table} 
