NKW MEXICO.As the question of boundary between the United Slate9 and Texas is now the subject of discussion, it ia iin|Mriant to seo to whom the torriiory of New Mexico belonged, as regarded by the administration olWIr. Polk. Thosj democrats whoendorsedby resolution all Mr. Polk’s nets while President, will find Do difficulty in eating their resolutions, in case it appears they regarded New Mexico as territory of the United Stales; a fact which many now without information deny. Mr. Polk not only treated Now Mexico as b longing the Union, but usurped the power of authorizing Gen’l Kearney to appoint all the civil officers tor the same, as will bo soon from the annexed